阅读说明：本技术 一种彩色滤光片的制作方法及彩色滤光片 (Color filter manufacturing method and color filter ) 是由 孙承啸 周淼 于 2021-08-17 设计创作，主要内容包括：本申请实施例公开了一种彩色滤光片的制作方法及彩色滤光片,彩色滤光片的制作方法包括以下步骤：提供基板；在基板上涂覆量子点墨水,形成初始量子点滤光层；采用阴离子交换液对部分初始量子点滤光层进行离子交换处理,使部分初始量子点滤光层转化为至少一种转换量子点滤光层,初始量子点滤光层和至少一种转换量子点滤光层中的任意两种的透光颜色不同。本申请可以提高量子点材料的利用率,同时提高彩色滤光片的制程效率,有利于实现彩色滤光片的量产化。(The embodiment of the application discloses a manufacturing method of a color filter and the color filter, wherein the manufacturing method of the color filter comprises the following steps: providing a substrate; coating quantum dot ink on the substrate to form an initial quantum dot filter layer; and carrying out ion exchange treatment on part of the initial quantum dot filter layer by adopting an anion exchange liquid, so that part of the initial quantum dot filter layer is converted into at least one conversion quantum dot filter layer, and the light transmission colors of any two of the initial quantum dot filter layer and the at least one conversion quantum dot filter layer are different. The method and the device can improve the utilization rate of the quantum dot material, improve the process efficiency of the color filter, and are favorable for realizing the mass production of the color filter.)

1. A method for manufacturing a color filter is characterized by comprising the following steps:

providing a substrate;

coating quantum dot ink on the substrate to form an initial quantum dot filter layer; and

and carrying out ion exchange treatment on part of the initial quantum dot filter layer by adopting an anion exchange liquid, so that part of the initial quantum dot filter layer is converted into at least one conversion quantum dot filter layer, and the light transmission colors of any two of the initial quantum dot filter layer and the at least one conversion quantum dot filter layer are different.

2. The method of claim 1, wherein the conversion quantum dot filter layer comprises a first conversion quantum dot filter layer and a second conversion quantum dot filter layer, and the anion exchange liquid comprises a first anion exchange liquid and a second anion exchange liquid;

the step of performing ion exchange treatment on part of the initial quantum dot filter layer by using anion exchange liquid to convert part of the initial quantum dot filter layer into at least one conversion quantum dot filter layer comprises the following steps:

forming a first light resistance layer on the initial quantum dot filter layer;

patterning the first photoresist layer to expose a first region of the initial quantum dot filter layer;

performing ion exchange treatment on the initial quantum dot filter layer of the first area by using the first anion exchange liquid, and converting the initial quantum dot filter layer of the first area into the first conversion quantum dot filter layer after the ion exchange treatment;

removing the first photoresist layer;

forming a second light resistance layer on the initial quantum dot filter layer and the first conversion quantum dot filter layer;

patterning the second photoresist layer to expose a second region of the initial quantum dot filter layer;

performing ion exchange treatment on the initial quantum dot filter layer of the second area by using the second anion exchange liquid, and converting the initial quantum dot filter layer of the second area into a second conversion quantum dot filter layer after the ion exchange treatment; and

and removing the second photoresist layer.

3. The method of claim 2, wherein the initial quantum dot filter layer is one of a red filter layer, a green filter layer, and a blue filter layer, the first conversion quantum dot filter layer is one of a red filter layer, a green filter layer, and a blue filter layer, the second conversion quantum dot filter layer is one of a red filter layer, a green filter layer, and a blue filter layer, and a light transmission color of the initial quantum dot filter layer, a light transmission color of the first conversion quantum dot filter layer, and a light transmission color of the second conversion quantum dot filter layer are different.

4. The method of claim 1, wherein the anion exchange solution comprises 1 wt% to 20 wt% of the ion donor and 80 wt% to 99 wt% of the solvent.

5. The method of claim 4, wherein the ion donor is selected from cesium chloride, cesium bromide, lead iodide, chloroacrylamide and tetraethylammonium iodide, and the solvent is methanol, dimethylformamide or octadecene.

6. The method of claim 4, wherein the anion exchange solution has a concentration of anions from the ion donor of 0.04mol/L to 0.8 mol/L.

7. The method according to any one of claims 1 to 6, wherein the step of performing ion exchange treatment on a part of the initial quantum dot filter layer by using an anion exchange solution comprises: and performing showering or soaking treatment on part of the initial quantum dot filter layer by adopting the anion exchange solution.

8. The method of any of claims 1-6, wherein before fabricating the initial quantum dot filter layer, the method further comprises:

manufacturing a black matrix on the substrate, wherein the black matrix is provided with a plurality of grooves on the substrate in a separating manner; and

the step of manufacturing the initial quantum dot filter layer is as follows: forming the initial quantum dot filter layer in the groove.

9. The method according to any one of claims 1 to 6, wherein after the step of performing an ion exchange treatment on a portion of the initial quantum dot filter layer with an anion exchange liquid to convert the portion of the initial quantum dot filter layer into at least one converted quantum dot filter layer, the method further comprises:

and arranging a protective layer on the initial quantum dot filter layer and the conversion quantum dot filter layer.

10. A color filter, comprising:

a substrate;

the initial quantum dot filter layer is arranged on one side of the substrate; and

at least one conversion quantum dot filter layer arranged on one side of the substrate corresponding to the initial quantum dot filter layer, wherein the conversion quantum dot filter layer and the initial quantum dot filter layer are arranged on the same layer;

the light transmission colors of any two of the initial quantum dot filter layer and the at least one conversion quantum dot filter layer are different, positive ions of quantum dots of the initial quantum dot filter layer are the same as positive ions of quantum dots of the conversion quantum dot filter layer, and anions of the quantum dots of the initial quantum dot filter layer are different from anions of the quantum dots of the conversion quantum dot filter layer.

Technical Field

The application relates to the technical field of display, in particular to a manufacturing method of a color filter and the color filter.

Background

The quantum dots as luminescent materials have the characteristics of high luminescent purity and wide emergent viewing angle, and can be used as color filter materials. Most of the currently studied quantum dot color filters implement patterned display by first preparing quantum dot ink and then printing the quantum dot ink on a substrate by an inkjet printing technology. The method not only takes longer time, but also has strict requirements on printing precision, and is not suitable for mass production.

Disclosure of Invention

The embodiment of the application provides a manufacturing method of a color filter and the color filter, which can improve the utilization rate of quantum dot materials, improve the processing efficiency of the color filter, and facilitate the realization of mass production of the color filter.

The embodiment of the application provides a manufacturing method of a color filter, which comprises the following steps:

providing a substrate;

coating quantum dot ink on the substrate to form an initial quantum dot filter layer; and

and carrying out ion exchange treatment on part of the initial quantum dot filter layer by adopting an anion exchange liquid, so that part of the initial quantum dot filter layer is converted into at least one conversion quantum dot filter layer, and the light transmission colors of any two of the initial quantum dot filter layer and the at least one conversion quantum dot filter layer are different.

Optionally, in some embodiments of the present application, the switching quantum dot filter layer comprises a first switching quantum dot filter layer and a second switching quantum dot filter layer, and the anion exchange liquid comprises a first anion exchange liquid and a second anion exchange liquid;

the step of performing ion exchange treatment on part of the initial quantum dot filter layer by using anion exchange liquid to convert part of the initial quantum dot filter layer into at least one conversion quantum dot filter layer comprises the following steps:

forming a first light resistance layer on the initial quantum dot filter layer;

patterning the first photoresist layer to expose a first region of the initial quantum dot filter layer;

performing ion exchange treatment on the initial quantum dot filter layer of the first area by using the first anion exchange liquid, and converting the initial quantum dot filter layer of the first area into the first conversion quantum dot filter layer after the ion exchange treatment;

removing the first photoresist layer;

forming a second light resistance layer on the initial quantum dot filter layer and the first conversion quantum dot filter layer;

patterning the second photoresist layer to expose a second region of the initial quantum dot filter layer;

performing ion exchange treatment on the initial quantum dot filter layer of the second area by using the second anion exchange liquid, and converting the initial quantum dot filter layer of the second area into a second conversion quantum dot filter layer after the ion exchange treatment; and

and removing the second photoresist layer.

Optionally, in some embodiments of the present application, the initial quantum dot filter layer is one of a red filter layer, a green filter layer, and a blue filter layer, the first switching quantum dot filter layer is one of a red filter layer, a green filter layer, and a blue filter layer, the second switching quantum dot filter layer is one of a red filter layer, a green filter layer, and a blue filter layer, and a light transmission color of the initial quantum dot filter layer, a light transmission color of the first switching quantum dot filter layer, and a light transmission color of the second switching quantum dot filter layer are different.

Optionally, in some embodiments of the present application, the anion exchange fluid comprises an ion donor in an amount of 1 wt% to 20 wt% and a solvent in an amount of 80 wt% to 99 wt%.

Alternatively, in some embodiments herein, the ion donor is selected from cesium chloride, cesium bromide, lead iodide, chloroacrylamide and tetraethylammonium iodide, and the solvent is methanol, dimethylformamide or octadecene.

Optionally, in some embodiments of the present application, the anion exchange solution has a concentration of anions provided by the ion donor of 0.04mol/L to 0.8 mol/L.

Optionally, in some embodiments of the present application, the step of performing ion exchange treatment on part of the initial quantum dot filter layer by using an anion exchange solution includes: and performing showering or soaking treatment on part of the initial quantum dot filter layer by adopting the anion exchange solution.

Optionally, in some embodiments of the present application, before the manufacturing of the initial quantum dot filter layer, the manufacturing method of the color filter further includes:

manufacturing a black matrix on the substrate, wherein the black matrix is provided with a plurality of grooves on the substrate in a separating manner; and

the step of manufacturing the initial quantum dot filter layer is as follows: forming the initial quantum dot filter layer in the groove.

Optionally, in some embodiments of the present application, after the step of performing an ion exchange treatment on a portion of the initial quantum dot filter layer by using an anion exchange liquid to convert the portion of the initial quantum dot filter layer into at least one conversion quantum dot filter layer, the method for manufacturing a color filter further includes:

and arranging a protective layer on the initial quantum dot filter layer and the conversion quantum dot filter layer.

The embodiment of the present application further provides a color filter, including:

a substrate;

the initial quantum dot filter layer is arranged on one side of the substrate; and

at least one conversion quantum dot filter layer arranged on one side of the substrate corresponding to the initial quantum dot filter layer, wherein the conversion quantum dot filter layer and the initial quantum dot filter layer are arranged on the same layer;

the light transmission colors of any two of the initial quantum dot filter layer and the at least one conversion quantum dot filter layer are different, positive ions of quantum dots of the initial quantum dot filter layer are the same as positive ions of quantum dots of the conversion quantum dot filter layer, and anions of the quantum dots of the initial quantum dot filter layer are different from anions of the quantum dots of the conversion quantum dot filter layer.

In the color filter manufacturing method and the color filter provided by the embodiment of the application, the initial quantum dot filter layer is manufactured on the substrate, and then the anion exchange liquid is adopted to perform ion exchange treatment on part of the initial quantum dot filter layer, so that part of the initial quantum dot filter layer is converted into at least one conversion quantum dot filter layer, the light transmission colors of any two of the initial quantum dot filter layer and the at least one conversion quantum dot filter layer are different, namely, quantum materials corresponding to the same light transmission color can be used for manufacturing filter layers with different colors, and the utilization rate of the quantum dot materials can be improved; compared with the quantum dot film formed by the ink-jet printing technology, part of the initial quantum dot filter layer can be converted into the conversion quantum dot filter layer at one time through ion exchange treatment, so that the process efficiency of the color filter can be improved, and the mass production of the color filter can be realized; in addition, the conversion quantum dot filter layer is obtained by performing ion exchange treatment on part of the initial quantum dot filter layer by using anion exchange liquid, and a coffee ring effect is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic flowchart illustrating a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 2 is a schematic top view of a substrate provided in a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 3 is a schematic top view of a first semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 4 is a schematic cross-sectional structural diagram of a first semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 5 is a schematic top view of a second semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 6 is a schematic cross-sectional structural diagram of a second semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 7 is a schematic top view illustrating a third semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 8 is a schematic cross-sectional structure diagram of a third semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 9 is a schematic top view illustrating a fourth semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 10 is a schematic cross-sectional structure diagram of a fourth semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 11 is a schematic top view illustrating a fifth semi-finished product according to an embodiment of the present disclosure;

fig. 12 is a schematic cross-sectional structural diagram of a fifth semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 13 is a schematic top view illustrating a sixth semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 14 is a schematic cross-sectional structure view of a sixth semi-finished product provided in a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 15 is a schematic top view illustrating a seventh semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 16 is a schematic cross-sectional structural diagram of a seventh semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present application;

fig. 17 is a schematic top view illustrating an eighth semi-finished product provided in a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 18 is a schematic cross-sectional structure view of an eighth semi-finished product provided in a method for manufacturing a color filter according to an embodiment of the present application;

fig. 19 is a schematic top view illustrating a ninth semi-finished product according to an embodiment of the present disclosure;

fig. 20 is a schematic cross-sectional structural diagram of a ninth semi-finished product provided in the method for manufacturing a color filter according to the embodiment of the present application;

fig. 21 is a schematic top view illustrating a tenth semi-finished product according to a method for manufacturing a color filter in an embodiment of the present disclosure;

fig. 22 is a schematic cross-sectional structure diagram of a tenth semi-finished product provided by a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 23 is a schematic top view illustrating an eleventh semi-finished product provided in a method for manufacturing a color filter according to an embodiment of the present disclosure;

fig. 24 is a schematic cross-sectional structure view of a twelfth semi-finished product provided in the method for manufacturing a color filter according to the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a manufacturing method of a color filter and the color filter. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments. In addition, in the description of the present application, the term "including" means "including but not limited to". The terms first, second, third and the like are used merely as labels, and do not impose numerical requirements or an established order. Various embodiments of the invention may exist in a range of versions; it is to be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the invention; accordingly, the described range descriptions should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, it is contemplated that the description of a range from 1 to 6 has specifically disclosed sub-ranges such as, for example, from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as individual numbers within a range such as, for example, 1, 2, 3, 4, 5, and 6, as applicable regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any number (fractional or integer) recited within the indicated range.

Referring to fig. 1, an embodiment of the present disclosure provides a method for manufacturing a color filter, including the following steps:

step S10, as shown in fig. 2, providing a substrate 110;

step S20, with reference to fig. 3 and 4, of coating quantum dot ink on the substrate 110 to form an initial quantum dot filter layer 120, so as to obtain the first semi-finished product 301 shown in fig. 3 and 4; and

step S30, as shown in fig. 20, an anion exchange solution is used to perform an ion exchange treatment on a part of the initial quantum dot filter layer 120, so that the part of the initial quantum dot filter layer 120 is converted into at least one converted quantum dot filter layer 130, thereby obtaining the ninth semi-finished product 309 shown in fig. 20, where any two of the initial quantum dot filter layer 120 and the at least one converted quantum dot filter layer 130 have different light transmission colors.

It should be explained that in the quantum dot ink, anions of the quantum dots can be freely transferred, and the color of the quantum dots is related to the anions, specifically, the number of the anions in the anion exchange liquid is much higher than that of the anions of the quantum dots, and the anions in the anion exchange liquid can exchange the anions of the quantum dots by virtue of an in-situ anion exchange principle, so that the anions of the quantum dots can be changed, and further, the color of the quantum dots can be changed.

In the method for manufacturing a color filter provided by the embodiment of the application, the initial quantum dot filter layer 120 is manufactured on the substrate 110, and then the anion exchange solution is used for performing ion exchange treatment on part of the initial quantum dot filter layer 120, so that part of the initial quantum dot filter layer 120 is converted into at least one conversion quantum dot filter layer 130, and any two of the initial quantum dot filter layer 120 and the at least one conversion quantum dot filter layer 130 have different light transmission colors, that is, quantum materials corresponding to the same light transmission color can be used for manufacturing filter layers with different colors, and the utilization rate of quantum dot materials can be improved; compared with the quantum dot film formed by the ink-jet printing technology, part of the initial quantum dot filter layer 120 can be converted into the conversion quantum dot filter layer 130 at one time through ion exchange treatment, so that the process efficiency of the color filter can be improved, and the mass production of the color filter can be realized; in addition, the converted quantum dot filter layer 130 of the present application is obtained by performing an ion exchange treatment on a part of the initial quantum dot filter layer 120 using an anion exchange liquid, and there is no coffee ring effect.

It should be noted that, for explaining the principle of the present application, in the embodiment of the present application, a part of the initial quantum dot filter layer 120 is converted into one, two, or more than two kinds of conversion quantum dot filter layers 130 after being subjected to the ion exchange treatment, and for example, a part of the initial quantum dot filter layer 120 is converted into two kinds of conversion quantum dot filter layers 130 after being subjected to the ion exchange treatment, according to the selection of the actual situation and the specific requirement, the kind of the conversion quantum dot filter layer 130 obtained after being subjected to the ion exchange treatment by the part of the initial quantum dot filter layer 120 may be appropriately adjusted, which is not limited herein.

As an embodiment of the present application, as shown in fig. 20, a part of the initial quantum dot filter layer 120 is converted into two kinds of converted quantum dot filter layers 130 after ion exchange treatment, that is, the conversion quantum dot filter layer 130 includes a first conversion quantum dot filter layer 131 and a second conversion quantum dot filter layer 132, the anion exchange liquid includes a first anion exchange liquid and a second anion exchange liquid, a part of the initial quantum dot filter layer 120 is converted into the first conversion quantum dot filter layer 131 after the ion exchange treatment of the first anion exchange liquid, a part of the initial quantum dot filter layer 120 is converted into the second conversion quantum dot filter layer 132 after the ion exchange treatment of the second anion exchange liquid, in this embodiment, the step of performing an ion exchange treatment on a part of the initial quantum dot filter layer 120 by using an anion exchange liquid to convert the part of the initial quantum dot filter layer 120 into at least one conversion quantum dot filter layer 130 includes:

step S31, with reference to fig. 5 and fig. 6, forming a first photoresist layer 140 on the initial quantum dot filter layer 120, so as to obtain the second semi-finished product 302 shown in fig. 5 and fig. 6, in this embodiment, the first photoresist layer 140 may be formed by coating the entire surface of the substrate 110 and the initial quantum dot filter layer 120;

step S32, as shown in fig. 7 and 8, patterning the first photoresist layer 140 to expose the first region 121 of the initial quantum dot filter layer 120, so as to obtain the third semi-finished product 303 shown in fig. 7 and 8, in this embodiment, the first photoresist layer 140 may be specifically, but not limited to, patterned by a photolithography process;

step S33, as shown in fig. 8 to 10, performing ion exchange treatment on the initial quantum dot filter layer 120 in the first area 121 by using a first anion exchange liquid, and converting the initial quantum dot filter layer 120 in the first area 121 into a first converted quantum dot filter layer 131 after the ion exchange treatment, so as to obtain the fourth semi-finished product 304 shown in fig. 9 and 10;

step S34, with reference to fig. 10 to 12, removing the first photoresist layer 140 to obtain the fifth semi-finished product 305 shown in fig. 11 and 12, in this embodiment, a stripping solution may be specifically used to strip the first photoresist layer 140;

step S35, in conjunction with fig. 13 and 14, forming a second photoresist layer 150 on the initial quantum dot filter layer 120 and the first conversion quantum dot filter layer 131, so as to obtain the sixth semi-finished product 306 shown in fig. 13 and 14, in this embodiment, the second photoresist layer 150 may be formed by coating the entire surface of the substrate 110, the initial quantum dot filter layer 120, and the first conversion quantum dot filter layer 131;

step S36, as shown in fig. 15 and 16, patterning the second photoresist layer 150 to expose the second region 122 of the initial quantum dot filter layer 120, so as to obtain the seventh semi-finished product 307 shown in fig. 15 and 16, in this embodiment, the second photoresist layer 150 may be specifically, but not limited to, patterned by a photolithography process;

step S37, with reference to fig. 16 to 18, performing ion exchange treatment on the initial quantum dot filter layer 120 in the second area 122 by using a second anion exchange liquid, and converting the initial quantum dot filter layer 120 in the second area 122 into a second converted quantum dot filter layer 132 after the ion exchange treatment, so as to obtain the eighth semi-finished product 308 shown in fig. 17 and 18; and

step S38, in conjunction with fig. 18 to 20, removes the second photoresist layer 150, so as to obtain the ninth semi-finished product 309 shown in fig. 19 and 20, in this embodiment, a stripping solution may be specifically used to strip the second photoresist layer 150.

As a specific embodiment of the present application, the quantum dot ink includes an ink solvent in an amount of 90 wt% to 99 wt%, perovskite quantum dots in an amount of 1 wt% to 10 wt%, and diffusion particles in an amount of 0 wt% to 1 wt%, for example, in the quantum dot ink, the ink solvent may be in an amount of 90 wt%, 95 wt%, or 99 wt%, the perovskite quantum dots may be in an amount of 1 wt%, 5 wt%, or 10 wt%, and the diffusion particles may be in an amount of 0 wt%, 0.5 wt%, or 1 wt%, and the content of each component may be appropriately adjusted according to the selection of the actual situation and the specific requirement, and is not limited herein.

As a specific embodiment of the present application, the quantum dot ink is prepared by the following steps: mixing the ink solvent, the perovskite quantum dots and the diffusion particles, and then mechanically stirring at the temperature of 0-50 ℃, at the stirring speed of 50-1000 rpm for 10-120 min. In this embodiment, the temperature during stirring may be 0 ℃, 25 ℃ or 50 ℃, the rotation speed of stirring may be 50rpm, 500rpm or 1000rpm, and the stirring time may be 10min, 60min or 120 min.

As one embodiment of the present application, the ink solvent is at least one selected from the group consisting of n-hexane, ethanol, ethyl acetate, cyclohexane, chloroform, acetone, tetrahydrofuran, methanol, acetonitrile, isopropanol and propionitrile, and the boiling point of the above solvent is less than 100 ℃, and the reaction rate can be conveniently controlled.

As an embodiment of the present application, in step S20, quantum dot ink is coated on the substrate 110, wherein the process parameters are as follows: the coating temperature is 0 to 50 ℃, the coating thickness is 10 to 200 μm, and the thickness of the prepared initial quantum dot filter layer 120 is 1 to 20 μm. Specifically, the process parameters for coating the quantum dot ink on the substrate 110 may be: the coating temperature is 0 c, 25 c or 50 c, the coating thickness is 10 d, 100 d or 200 d, and the thickness of the prepared initial quantum dot filter layer 120 is 1 d, 10 d or 20 d.

As an embodiment of the present application, in the step S20, after the quantum dot ink is coated on the substrate 110, the quantum dot ink on the substrate 110 is baked to evaporate the ink solvent, so as to form the initial quantum dot filter layer 120, wherein the baking process parameters are: the baking temperature is 60 deg.C-150 deg.C, and baking time is 1min-60min, such as 60 deg.C, 100 deg.C or 150 deg.C, and baking time is 1min, 30min or 60 min. In this embodiment, a vacuum oven may be used to bake the quantum dot ink, and the vacuum degree of the vacuum oven is less than-50 kPa.

As one embodiment of the present application, the perovskite quantum dot may be composed of cesium (Cs), lead (Pb), and a halogen element selected from one of chlorine (Cl), bromine (Br), and iodine (I), and particularly, the perovskite quantum dot may be Cs_zPb_yX_z+2y(X ═ Cl, Br or I) or Cs_zBi_yX_z+3y(X ═ Cl, Br or I), where Cs is_zPb_yI_z+2yAnd Cs_zBi_yI_z+3yIs red quantum dot, Cs_zPb_yBr_z+2yAnd Cs_zBi_yBr_z+3yIs green quantum dot, Cs_zPb_yCl_z+2yAnd Cs_zBi_yCl_z+3yIs a blue quantum dot. For example, the perovskite quantum dots may be CsPbCl₃、CsPbBr₃、CsPbI₃、Cs₃Bi₂Br₉、Cs₃Bi₂Cl₉Or Cs₃Bi₂I₉Wherein, CsPbI₃And Cs₃Bi₂I₉Being red quantum dots, CsPbBr₃And Cs₃Bi₂Br₉Is green quantum dot, CsPbCl₃And Cs₃Bi₂Cl₉Is a blue quantum dot.

As one embodiment of the present application, the diffusion particles are used for scattering light, and the diffusion particles may be inorganic particles and organic particlesAt least one of the organic particles, wherein the inorganic particles may be selected from titanium dioxide (TiO)₂) Silicon dioxide (SiO)₂) Zirconium dioxide (ZrO)₂) And silicate, etc., and the organic particles may be selected from one or more of polystyrene, polycarbonate, and polysiloxane.

As one embodiment of the present application, as shown in fig. 20, the initial quantum dot filter layer 120 may be one of a red filter layer, a green filter layer, and a blue filter layer, the first conversion quantum dot filter layer 131 may be one of a red filter layer, a green filter layer, and a blue filter layer, the second conversion quantum dot filter layer 132 may be one of a red filter layer, a green filter layer, and a blue filter layer, and a light transmission color of the initial quantum dot filter layer 120, a light transmission color of the first conversion quantum dot filter layer 131, and a light transmission color of the second conversion quantum dot filter layer 132 are different. It should be understood that in the present embodiment, the red filter layer only allows red light to pass through, the green filter layer only allows green light to pass through, and the blue filter layer only allows blue light to pass through.

As one embodiment of the present application, the anion exchange liquids (the first anion exchange liquid and the second anion exchange liquid) include an ion donor in an amount of 1 wt% to 20 wt% for providing anions to ion-exchange with the anions of the initial quantum dot filter layer 120, and a solvent in an amount of 80 wt% to 99 wt%, thereby obtaining at least one converted quantum dot filter layer 130 with different transmission colors.

As one embodiment of the present application, the anion exchange liquids (the first anion exchange liquid and the second anion exchange liquid) are prepared in a manner that: and mixing the ion donor and the solvent, and then mechanically stirring, wherein the stirring temperature is 20-80 ℃, the stirring rotation speed is 50-1000 rpm, and the stirring time is 5-30 min, so that the ion donor is completely dissolved in the solvent. In this embodiment, the temperature during stirring may be 20 ℃, 50 ℃ or 80 ℃, the rotation speed of stirring may be 50rpm, 500rpm or 1000rpm, and the stirring time may be 5min, 20min or 30 min.

As a specific embodiment of the present applicationThe anion provided by the ion donor is a halide ion selected from chloride (Cl)^-) Bromine ion (Br)^-) And iodide ion (I)^-) One of them, for example, the ion donor is selected from inorganic salts such as cesium chloride, cesium bromide, cesium iodide, lead chloride, lead bromide, lead iodide, chloroacrylamide and tetraethylammonium iodide, and of course, may be selected from organic salts containing chloride, bromide and iodide ions, specifically, anions to be supplied by the ion donor, for example:

(1) when the quantum dot material of the initial quantum dot filter layer 120 is Cs_zPb_yI_z+2yOr Cs_zBi_yI_z+3yIn the meantime, anions of the quantum dot material of the initial quantum dot filter layer 120 are iodide ions, provided anions of the first anion exchange liquid are exchanged with the iodide ions of the initial quantum dot filter layer 120 to obtain the first converted quantum dot filter layer 131, provided anions of the second anion exchange liquid are exchanged with the iodide ions of the initial quantum dot filter layer 120 to obtain the second converted quantum dot filter layer 132, provided anions of the ion donor of the first anion exchange liquid and provided anions of the ion donor of the second anion exchange liquid may be respectively one of chloride ions and bromide ions, and a reaction equation of the chloride ions and the bromide ions respectively ion-exchanged with the iodide ions is as follows:

Cs_zPb_yI_z+2y/Cs_zBi_yI_z+3y+Cl^-→Cs_zPb_yCl_z+2y/Cs_zBi_yCl_z+3y+I^-，

Cs_zPb_yI_z+2y/Cs_zBi_yI_z+3y+Br^-→Cs_zPb_yBr_z+2y/Cs_zBi_yBr_z+3y+I^-；

(2) when the quantum dot material of the initial quantum dot filter layer 120 is Cs_zPb_yBr_z+2yOr Cs_zBi_yBr_z+3yThen, the anions of the quantum dot material of the initial quantum dot filter layer 120 are bromide ions, and the first anions are crossedThe provided anions of the exchange liquid are exchanged with the bromide ions of the initial quantum dot filter layer 120 to obtain a first conversion quantum dot filter layer 131, the provided anions of the second anion exchange liquid are exchanged with the bromide ions of the initial quantum dot filter layer 120 to obtain a second conversion quantum dot filter layer 132, the anions provided by the ion donor of the first anion exchange liquid and the anions provided by the ion donor of the second anion exchange liquid may respectively provide one of chloride ions and iodide ions, and the reaction equation for the ion exchange between the chloride ions and the iodide ions and the bromide ions is as follows:

Cs_zPb_yBr_z+2y/Cs_zBi_yBr_z+3y+Cl^-→Cs_zPb_yCl_z+2y/Cs_zBi_yCl_z+3y+Br^-，

Cs_zPb_yBr_z+2y/Cs_zBi_yBr_z+3y+I^-→Cs_zPb_yl_z+2y/Cs_zBi_yI_z+3y+Br^-；

(3) when the quantum dot material of the initial quantum dot filter layer 120 is Cs_zPb_yCl_z+2yOr Cs_zBi_yCl_z+3yIn the meantime, anions of the quantum dot material of the initial quantum dot filter layer 120 are chloride ions, provided anions of the first anion exchange liquid are exchanged with the chloride ions of the initial quantum dot filter layer 120 to obtain the first converted quantum dot filter layer 131, provided anions of the second anion exchange liquid are exchanged with the chloride ions of the initial quantum dot filter layer 120 to obtain the second converted quantum dot filter layer 132, provided anions of the ion donor of the first anion exchange liquid and provided anions of the ion donor of the second anion exchange liquid may be respectively one of bromide ions and iodide ions, and a reaction equation of the bromide ions and the iodide ions respectively ion-exchanged with the chloride ions is as follows:

Cs_zPb_yCl_z+2y/Cs_zBi_yCl_z+3y+Br^-→Cs_zPb_yBr_z+2y/Cs_zBi_yBr_z+3y+Cl^-，

Cs_zPb_yCl_z+2y/Cs_zBi_yCl_z+3y+I^-→Cs_zPb_yl_z+2y/Cs_zBi_yI_z+3y+Cl^-。

as a specific embodiment of the present application, a solvent is used to dissolve the ion donor, and the solvent may be an organic solvent, specifically, methanol, Dimethylformamide (DMF) or octadecene, and it is understood that the solvent may also be other organic solvents according to the selection and specific requirement of the actual situation, and is not limited herein.

As an embodiment of the present application, in the anion exchange liquids (the first anion exchange liquid and the second anion exchange liquid), the concentration of the anions provided by the ion donor is 0.04mol/L to 0.8mol/L, and at this concentration, the amount of the anions provided by the ion donor can be ensured, so as to facilitate the ion exchange between the anions provided by the ion donor and the anions of the quantum dot material of the initial quantum dot filter layer 120.

As a specific embodiment of the present application, the step of performing ion exchange treatment on part of the initial quantum dot filter layer 120 by using the anion exchange liquid (the first anion exchange liquid and the second anion exchange liquid) includes: and anion exchange liquid is adopted to perform showering or soaking treatment on part of the initial quantum dot filter layer 120, so that the operation is simple and the realization is easy.

As an embodiment of the present application, the process parameters of the showering or soaking treatment of the part of the initial quantum dot filter layer 120 with the anion exchange liquid (the first anion exchange liquid and the second anion exchange liquid) are as follows: the duration time is 10min-360min, and the temperature of the anion exchange liquid (the first anion exchange liquid and the second anion exchange liquid) is 20-120 ℃. In the present embodiment, the duration of the showering or soaking of the part of the initial quantum dot filter layer 120 with the anion exchange liquids (the first anion exchange liquid and the second anion exchange liquid) is 10min, 60min, 180min, 240min or 360min, and the temperature of the anion exchange liquids (the first anion exchange liquid and the second anion exchange liquid) is 20 ℃, 70 ℃ or 120 ℃.

As one embodiment of the present application, in step S20, a quantum dot ink is coated on the substrate 110, and the quantum dot material of the quantum dot ink is red quantum dot CsPbI₃Thereby forming an initial quantum dot filter layer 120, the initial quantum dot filter layer 120 being a red filter layer; in the step S33, the solvent of the first anion exchange liquid is methanol, the ion donor is cesium bromide, the first anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, a part of the initial quantum dot filter layer 120 is converted into the first converted quantum dot filter layer 131 after the ion exchange treatment, and the reaction equation of the ion exchange is: CsPbI₃+Br^-→CsPbBr₃+I^-The quantum dot material of the first conversion quantum dot filter layer 131 is CsPbBr₃The first conversion quantum dot filter layer 131 is a green filter layer; in the step S37, the solvent of the second anion exchange liquid is octadecene, the ion donor is chloropropenamide, the second anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, a part of the initial quantum dot filter layer 120 is converted into the second converted quantum dot filter layer 132 after the ion exchange treatment, and the reaction equation of the ion exchange is as follows: CsPbI₃+Cl^-→CsPbCl₃+I^-The quantum dot material of the second conversion quantum dot filter layer 132 is CsPbCl₃The second conversion quantum dot filter layer 132 is a blue filter layer.

As one embodiment of the present application, in step S20, a quantum dot ink is coated on the substrate 110, and the quantum dot material of the quantum dot ink is red quantum dot CsPbI₃Thereby forming an initial quantum dot filter layer 120, the initial quantum dot filter layer 120 being a red filter layer; in the step S33, the solvent of the first anion exchange liquid is octadecene, the ion donor is chloroacrylamide, the first anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, a part of the initial quantum dot filter layer 120 is converted into the first converted quantum dot filter layer 131 after the ion exchange treatment, and the reaction equation of the ion exchange isThe formula is as follows: CsPbI₃+Cl^-→CsPbCl₃+I^-The quantum dot material of the first conversion quantum dot filter layer 131 is CsPbCl₃The first conversion quantum dot filter layer 131 is a blue filter layer; in the step S37, the solvent of the second anion exchange liquid is methanol, the ion donor is cesium bromide, the exposed initial quantum dot filter layer 120 is subjected to a showering or soaking treatment by using the second anion exchange liquid, and a part of the initial quantum dot filter layer 120 is converted into the second converted quantum dot filter layer 132 after the ion exchange treatment, where the reaction equation of the ion exchange is: CsPbI₃+Br^-→CsPbBr₃+I^-The quantum dot material of the second conversion quantum dot filter layer 132 is CsPbBr₃The second conversion quantum dot filter layer 132 is a green filter layer.

As one embodiment of the present application, in step S20, a quantum dot ink is coated on the substrate 110, and the quantum dot material of the quantum dot ink is green quantum dot CsPbBr₃Thereby forming an initial quantum dot filter layer 120, the initial quantum dot filter layer 120 being a green filter layer; in the step S33, the solvent of the first anion exchange liquid is octadecene, the ion donor is chloroacrylamide, the first anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, a part of the initial quantum dot filter layer 120 is converted into the first conversion quantum dot filter layer 131 after the ion exchange treatment, and the reaction equation of the ion exchange is: CsPbBr₃+Cl^-→CsPbCl₃+Br^-The quantum dot material of the first conversion quantum dot filter layer 131 is CsPbCl₃The first conversion quantum dot filter layer 131 is a blue filter layer; in the step S37, the solvent of the second anion exchange liquid is octadecene, the ion donor is tetraethylammonium iodide, the second anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, and a part of the initial quantum dot filter layer 120 is converted into the second converted quantum dot filter layer 132 after the ion exchange treatment, where the reaction equation of the ion exchange is: CsPbBr₃+I^-→CsPbI₃+Br^-Quantum dot material of the second converted quantum dot filter layer 132The material is CsPbI₃The second conversion quantum dot filter layer 132 is a red filter layer.

As one embodiment of the present application, in step S20, a quantum dot ink is coated on the substrate 110, and the quantum dot material of the quantum dot ink is green quantum dot CsPbBr₃Thereby forming an initial quantum dot filter layer 120, the initial quantum dot filter layer 120 being a green filter layer; in the step S33, the solvent of the first anion exchange liquid is octadecene, the ion donor is tetraethylammonium iodide, the first anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, and a part of the initial quantum dot filter layer 120 is converted into the first conversion quantum dot filter layer 131 after the ion exchange treatment, where the reaction equation of the ion exchange is: CsPbBr₃+I^-→CsPbI₃+Br^-The quantum dot material of the first conversion quantum dot filter layer 131 is CsPbI₃The first conversion quantum dot filter layer 131 is a red filter layer; in the step S37, the solvent of the second anion exchange liquid is octadecene, the ion donor is chloropropenamide, the second anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, a part of the initial quantum dot filter layer 120 is converted into the second converted quantum dot filter layer 132 after the ion exchange treatment, and the reaction equation of the ion exchange is as follows: CsPbBr₃+Cl^-→CsPbCl₃+Br^-The quantum dot material of the second conversion quantum dot filter layer 132 is CsPbCl₃The second conversion quantum dot filter layer 132 is a blue filter layer.

As one embodiment of the present application, in step S20, a quantum dot ink is coated on the substrate 110, and the quantum dot material of the quantum dot ink is blue quantum dot CsPbCl₃Thereby forming an initial quantum dot filter layer 120, the initial quantum dot filter layer 120 being a blue filter layer; in the step S33, the solvent of the first anion exchange liquid is octadecene, the ion donor is tetraethylammonium iodide, the first anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, and a part of the initial quantum dot filter layer 120 is converted into the second quantum dot filter layer after the ion exchange treatmentA converted quantum dot filter 131, the reaction equation of ion exchange is: CsPbCl₃+I^-→CsPbI₃+Cl^-The quantum dot material of the first conversion quantum dot filter layer 131 is CsPbI₃The first conversion quantum dot filter layer 131 is a red filter layer; in the step S37, the solvent of the second anion exchange liquid is methanol, the ion donor is cesium bromide, the exposed initial quantum dot filter layer 120 is subjected to a showering or soaking treatment by using the second anion exchange liquid, and a part of the initial quantum dot filter layer 120 is converted into the second converted quantum dot filter layer 132 after the ion exchange treatment, where the reaction equation of the ion exchange is: CsPbCl₃+Br^-→CsPbBr₃+Cl^-The quantum dot material of the second conversion quantum dot filter layer 132 is CsPbBr₃The second conversion quantum dot filter layer 132 is a green filter layer.

As one embodiment of the present application, in step S20, a quantum dot ink is coated on the substrate 110, and the quantum dot material of the quantum dot ink is blue quantum dot CsPbCl₃Thereby forming an initial quantum dot filter layer 120, the initial quantum dot filter layer 120 being a blue filter layer; in the step S33, the solvent of the first anion exchange liquid is methanol, the ion donor is cesium bromide, the first anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, a part of the initial quantum dot filter layer 120 is converted into the first converted quantum dot filter layer 131 after the ion exchange treatment, and the reaction equation of the ion exchange is: CsPbCl₃+Br^-→CsPbBr₃+Cl^-The quantum dot material of the first conversion quantum dot filter layer 131 is CsPbBr₃The first conversion quantum dot filter layer 131 is a green filter layer; in the step S37, the solvent of the second anion exchange liquid is octadecene, the ion donor is tetraethylammonium iodide, the second anion exchange liquid is used to perform a shower or immersion treatment on the exposed initial quantum dot filter layer 120, and a part of the initial quantum dot filter layer 120 is converted into the second converted quantum dot filter layer 132 after the ion exchange treatment, where the reaction equation of the ion exchange is: CsPbCl₃+I^-→CsPbI₃+Cl^-The quantum dot material of the second conversion quantum dot filter layer 132 is CsPbI₃The second conversion quantum dot filter layer 132 is a red filter layer.

As one embodiment of the present application, the thickness of the conversion quantum dot filter layer 130 (the first conversion quantum dot filter layer 131 and the second conversion quantum dot filter layer 132) is 1 μm to 20 μm, and specifically, the thickness of the conversion quantum dot filter layer 130 (the first conversion quantum dot filter layer 131 and the second conversion quantum dot filter layer 132) may be 1 μm, 10 μm, or 20 μm.

As an embodiment of the present application, as shown in fig. 3, 4, 21, and 22, before the manufacturing of the initial quantum dot filter layer 120, the method for manufacturing a color filter further includes: the black matrix 160 is fabricated on the substrate 110, the black matrix 160 partitions a plurality of grooves 161 on the substrate 110, and the grooves 161 are used for accommodating the initial quantum dot filter layer 120, so as to fabricate the tenth semi-finished product 310 shown in fig. 21 and 22. With such a configuration, referring to fig. 23 and fig. 24 together, the following step S20 of manufacturing the initial quantum dot filter layer 120 includes: forming an initial quantum dot filter layer 120 in the groove 161; in the subsequent step S30, after soaking or showering a part of the initial quantum dot filter layer 120 with an anion exchange liquid (the first anion exchange liquid and the second anion exchange liquid), the initial quantum dot filter layer 120 in the corresponding groove 161 may be converted into a converted quantum dot filter layer 130 (the first converted quantum dot filter layer 131 and the second converted quantum dot filter layer 132), so as to obtain an eleventh semi-finished product 311 shown in fig. 23, in this embodiment, the black matrix 160 can ensure that only the exposed initial quantum dot filter layer 120 is subjected to an ion exchange treatment, and the anion exchange liquid (the first anion exchange liquid and the second anion exchange liquid) is prevented from performing an ion exchange treatment on the unexposed initial quantum dot filter layer 120; and after the color filter is manufactured after step 38, the black matrix 160 can prevent ion exchange between two adjacent filter layers with different colors; in addition, the black matrix 160 can prevent crosstalk between adjacent two different color filter layers.

As an embodiment of the present application, as shown in fig. 24, after the step of performing an ion exchange treatment on a part of the initial quantum dot filter layer 120 by using an anion exchange liquid to convert the part of the initial quantum dot filter layer 120 into at least one conversion quantum dot filter layer 130, the method for manufacturing a color filter further includes: a protective layer 170 is provided on the initial quantum dot filter layer 120 and the conversion quantum dot filter layer 130 (the first conversion quantum dot filter layer 131 and the second conversion quantum dot filter layer 132), thereby producing a twelfth semi-finished product 312 shown in fig. 24. With this configuration, the protection layer 170 covers the surfaces of the initial quantum dot filter layer 120 and the conversion quantum dot filter layer 130 (the first conversion quantum dot filter layer 131 and the second conversion quantum dot filter layer 132), so as to perform the functions of blocking and protecting, and effectively improve the stability of the quantum dot materials of the initial quantum dot filter layer 120 and the conversion quantum dot filter layer 130. In the present embodiment, the protective layer 170 may be, but is not limited to, a polymer material.

Referring to fig. 20 and fig. 24, an embodiment of the present application further provides a color filter manufactured by the method for manufacturing a color filter, where the color filter includes a substrate, an initial quantum dot filter layer and at least one conversion quantum dot filter layer, the initial quantum dot filter layer is disposed on one side of the substrate, the conversion quantum dot filter layer is disposed on one side of the substrate corresponding to the initial quantum dot filter layer, and the conversion quantum dot filter layer and the initial quantum dot filter layer are disposed on the same layer; the light transmission colors of any two of the initial quantum dot filter layer and the at least one conversion quantum dot filter layer are different, positive ions of quantum dots of the initial quantum dot filter layer are the same as positive ions of quantum dots of the conversion quantum dot filter layer, and negative ions of the quantum dots of the initial quantum dot filter layer are different from negative ions of the quantum dots of the conversion quantum dot filter layer. Since the color filter provided by this embodiment adopts all the technical solutions of all the embodiments described above, all the beneficial effects brought by the technical solutions of the embodiments are also achieved, and are not described in detail herein.

The above detailed description is provided for the manufacturing method of the color filter and the color filter provided in the embodiments of the present application, and the specific examples are applied herein to explain the principle and the implementation of the present application, and the description of the above embodiments is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.