阅读说明：本技术 Oled器件及oled显示装置 (OLED device and OLED display device ) 是由 欧阳攀 施秉彝 于 2019-09-18 设计创作，主要内容包括：本发明实施例是关于一种OLED器件。该OLED器件包括：衬底基板,所述衬底基板表面层叠形成有TFT阵列层、阳极层、有机发光功能层、阴极层、薄膜封装层和光色转换层；其中,所述有机发光功能层包括至少一层发出第一波长光的第一发光层,且该有机发光功能层的投影区域覆盖所述阳极层的至少部分表面；所述光色转换层包括受到所述第一波长光激发而发出第二波长光的第二发光层。本发明实施例一方面,可以在一定程度上解决Panel色偏的问题,进而延长整个显示器的使用寿命；另一方面,该器件膜层结构的设计有助于节约生产制造成本、降低器件功耗。(The embodiment of the invention relates to an OLED device. The OLED device includes: the light-emitting diode comprises a substrate base plate, wherein a TFT array layer, an anode layer, an organic light-emitting functional layer, a cathode layer, a thin film packaging layer and a light color conversion layer are formed on the surface of the substrate base plate in a laminated mode; the organic light-emitting functional layer comprises at least one first light-emitting layer which emits light with a first wavelength, and a projection area of the organic light-emitting functional layer covers at least part of the surface of the anode layer; the photochromic conversion layer comprises a second light emitting layer which is excited by the first wavelength light and emits second wavelength light. On one hand, the embodiment of the invention can solve the problem of Panel color cast to a certain extent, thereby prolonging the service life of the whole display; on the other hand, the design of the film layer structure of the device is beneficial to saving the production and manufacturing cost and reducing the power consumption of the device.)

1. An OLED device, comprising:

the light-emitting diode comprises a substrate base plate, wherein a TFT array layer, an anode layer, an organic light-emitting functional layer, a cathode layer, a thin film packaging layer and a light color conversion layer are formed on the surface of the substrate base plate in a laminated mode;

the organic light-emitting functional layer comprises at least one first light-emitting layer which emits light with a first wavelength, and a projection area of the organic light-emitting functional layer covers at least part of the surface of the anode layer;

the photochromic conversion layer comprises a second light emitting layer which is excited by the first wavelength light and emits second wavelength light.

2. The OLED device of claim 1, wherein the first light-emitting layer includes at least two blue light-emitting layers, the at least two blue light-emitting layers being stacked, a hole transport layer disposed below each of the blue light-emitting layers, and an electron transport layer disposed above each of the blue light-emitting layers.

3. The OLED device of claim 2, wherein a charge generation layer is disposed between adjacent blue light emitting layers, and the charge generation layer is disposed between a hole transport layer below an upper blue light emitting layer and an electron transport layer above the lower blue light emitting layer.

4. The OLED device of claim 3, wherein the charge generation layer has a thickness of

5. The OLED device of claim 3, wherein the charge generation layer includes one or more of:

an N-type doped organic layer and an inorganic metal oxide layer;

an N-type doped organic layer and an organic layer;

an N-type doped organic layer and a P-type doped organic layer;

non-doped.

6. The OLED device according to any of claims 1 to 5, wherein the second light emitting layer comprises a red light color conversion layer and/or a green light color conversion layer.

7. The OLED device of claim 6, wherein the red and green light color conversion layers are each 10nm to 1000nm thick.

8. The OLED device of claim 7, wherein the red light color conversion layer contains the dye NPAMLI, the dye MEH-PPV, a sulfur dye, or a nitrogenated dye.

9. The OLED device of claim 7, wherein the green light color conversion layer comprises one or more of xanthene dyes, coumarin dyes, and hemicyanine dyes.

10. An OLED display device comprising the OLED device of any one of claims 1-9.

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to an OLED device and an OLED display device.

Background

The OLED display is an organic electroluminescent display, and has the advantages of low power consumption, self-luminescence, high brightness, wide application range of operating temperature, light and thin volume, fast response speed, easy implementation of color display, easy implementation of matching with an integrated circuit driver, easy implementation of flexible display, etc., and compared with the conventional display used in most mobile phones, the OLED display has a wider viewing angle, a higher refresh rate, and a thinner size, and is therefore being adopted by smart phones and shows a rapid development trend.

At present, the OLED display device is mainly manufactured by attaching red (R), green (G), and blue (B) organic molecular materials to corresponding positions of a substrate by thermal evaporation, so that the red, green, and blue organic molecular materials are excited to emit light autonomously. At present, R, G, B, the life of the light emitting element is different, and color shift occurs when Panel is lighted for a long time. However, if the white light plus color filter technology is adopted, the efficiency of the color filter is reduced to a certain extent due to the filtering property of the color filter to the spectrum, which is not beneficial to reducing the power consumption, and the color filter layer is mainly realized by respectively evaporating red, green and blue organic molecular materials by using a fine mask (fine mask), however, the fine mask has the problems of complex processing technology, high price, evaporation contraposition and the like, and the development of the OLED display device is restricted to the extent of low-cost industrialization.

Therefore, further realization of OLED devices is becoming a desirable direction of improvement.

It is noted that this section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

Disclosure of Invention

It is an object of embodiments of the present invention to provide an OLED device that overcomes, at least to some extent, one or more of the problems due to limitations and disadvantages of the related art.

According to a first aspect of embodiments of the present invention, there is provided an OLED device comprising:

the light-emitting diode comprises a substrate base plate, wherein a TFT array layer, an anode layer, an organic light-emitting functional layer, a cathode layer, a thin film packaging layer and a light color conversion layer are formed on the surface of the substrate base plate in a laminated mode;

the organic light-emitting functional layer comprises at least one first light-emitting layer which emits light with a first wavelength, and a projection area of the organic light-emitting functional layer covers at least part of the surface of the anode layer;

the photochromic conversion layer comprises a second light emitting layer which is excited by the first wavelength light and emits second wavelength light.

In an embodiment of the invention, the first light emitting layer includes at least two blue light emitting layers, the at least two blue light emitting layers are stacked, a hole transport layer is disposed below each of the blue light emitting layers, and an electron transport layer is disposed above each of the blue light emitting layers.

In an embodiment of the invention, a charge generation layer is disposed between the adjacent blue light emitting layers, and the charge generation layer is disposed between a hole transport layer below the upper blue light emitting layer and an electron transport layer above the lower blue light emitting layer.

In an embodiment of the present invention, the thickness of the charge generation layer is

In an embodiment of the invention, the charge generation layer includes one or more of the following:

an N-type doped organic layer and an inorganic metal oxide layer;

an N-type doped organic layer and an organic layer;

an N-type doped organic layer and a P-type doped organic layer;

non-doped.

In an embodiment of the invention, the second light emitting layer includes a red light color conversion layer and/or a green light color conversion layer.

In an embodiment of the invention, the thicknesses of the red light color conversion layer and the green light color conversion layer are both 10nm to 1000 nm.

In an embodiment of the present invention, the red light color conversion layer contains NPAMLI dye, MEH-PPV dye, sulfur dye or nitride dye.

In an embodiment of the invention, the green light color conversion layer contains one or more of xanthene dyes, coumarin dyes and hemicyanine dyes.

In an embodiment of the invention, the OLED device comprises any one of the above-mentioned OLED devices.

According to a second aspect of embodiments of the present invention, there is provided an OLED display device including the OLED device according to any one of the above embodiments.

The technical scheme provided by the embodiment of the invention can have the following beneficial effects:

in the embodiment of the invention, through the OLED device and the OLED display device, on one hand, the current passing through the blue light emitting layer can be reduced through the series connection structure, so that the service life of the blue light emitting layer is prolonged, the problem of Panel color cast can be solved to a certain extent, and the service life of the whole display is prolonged; on the other hand, in the embodiment, the red light and/or the green light are obtained by the light color conversion layer, so that the use of a color filter is avoided, the number of evaporated fine masks is reduced, the production and manufacturing cost is saved, and the power consumption of the device is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

FIG. 1 shows a first schematic diagram of an OLED device structure in an exemplary embodiment of the invention;

FIG. 2 shows a schematic view of an organic light-emitting functional layer in an exemplary embodiment of the invention;

FIG. 3 shows a schematic diagram of a two-cell tandem blue light emitting layer in an exemplary embodiment of the invention;

FIG. 4 shows a schematic diagram of a three-cell tandem blue light emitting layer in an exemplary embodiment of the invention;

FIG. 5 shows a second schematic diagram of the OLED device structure in an exemplary embodiment of the invention;

fig. 6 shows a schematic diagram of a structure of an OLED device in an exemplary embodiment of the invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of embodiments of the invention, which are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

An embodiment of the present application provides an OLED device, which may include, as shown in fig. 1 to 2: the light emitting diode comprises a substrate 100, wherein a TFT array layer 200, an anode layer 300, an organic light emitting function layer 400, a cathode layer 500, a thin film packaging layer 600 and a light color conversion layer 700 are formed on the surface of the substrate 100 in a stacking manner;

wherein the organic light emitting functional layer 400 includes at least one first light emitting layer emitting light of a first wavelength, such as a blue light emitting layer 401, and a projection area of the organic light emitting functional layer 400 covers at least a portion of a surface of the anode layer 300; the photochromic conversion layer 700 includes a second light emitting layer such as a red photochromic conversion layer 701 which is excited by the light with the first wavelength and emits light with a second wavelength.

In the embodiment of the invention, through the OLED device, the light with the second wavelength is obtained by the second light emitting layer such as the red light color conversion layer 701, so that the use of a color filter is avoided, the number of evaporated fine masks is reduced, the production cost is saved, and the power consumption of the device is reduced.

Next, each part of the above-described OLED device in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 6.

In one embodiment, the first light emitting layer includes at least two blue light emitting layers 401, the at least two blue light emitting layers 401 are stacked, a hole transport layer 403 is disposed below each blue light emitting layer 401, and an electron transport layer 404 is disposed above each blue light emitting layer 401. The addition of the hole transport layer 403 and the electron transport layer 404 can improve the injection efficiency of carriers, thereby improving the efficiency of the OLED device, but is not limited thereto, and a hole injection layer, an electron injection layer, and the like can be introduced on the basis to further improve the efficiency of the OLED device.

In one embodiment, a charge generation layer 402 is disposed between adjacent blue light emitting layers 401, and the charge generation layer 402 is disposed between a hole transport layer 403 below the upper blue light emitting layer 401 and an electron transport layer 404 above the lower blue light emitting layer. The charge generation layer 402 structure is a serial OLED structure formed by stacking two or more OLED light-emitting units, and the serial OLED controlled by an external power has higher light-emitting brightness compared with the conventional OLED, and the current efficiency is multiplied by the number of the serial OLED light-emitting units. Because the series OLED can obtain a very high initial brightness under a smaller current density, when the initial brightness is converted into the same initial brightness, the service life of the series OLED is greatly prolonged compared with that of a traditional device, and the blue light emitting layer 401 has a longer service life and can further avoid the problem of color cast displayed by the OLED device to a certain extent. The charge generation layer 402 not only serves to connect the light emitting units, but also generates holes and electrons to improve the efficiency of the OLED device.

In one embodiment, the thickness of the charge generation layer 402 may be set toBut not limited thereto, it may be set as desired, but the thickness of the charge generation layer 402 is setThis is preferable because the thickness of the charge generation layer 402 exceeds the thickness of the charge generation layerToo thick is not conducive to charge carrier generation and mass production. Specifically, the thickness of the charge generation layer may be set as followsOrOrOrOrOrThe arrangement may be set according to practical situations, and is not limited herein, so that the arrangement is beneficial to generation of charge carriers and mass production.

In one embodiment, the charge generation layer 402 includes one or more of: n-type doped organic layers and inorganic metal oxide layers such as Alq₃Mg and WO₃(ii) a N-type doped organic layers and organic layers such as Alq₃Li and HAT-CN; n-type doped organic layers and P-type doped organic layers such as Alq₃Li and NPB FeCl₃(ii) a Non-doped type such as Al and WO₃And Au. This arrangement can provide better transport efficiency of the charge generation layer 402, but is not limited thereto, and other materials can be selected according to practical situations.

In one embodiment, referring to fig. 1, the second light emitting layer includes a red light color conversion layer 701 and/or a green light color conversion layer 702, and in this embodiment, the red light and/or the green light is obtained from the light color conversion layer 700, so as to avoid the use of a color filter, further reduce the number of vapor deposition fine masks, and contribute to saving the production cost and reducing the power consumption of the device.

In one embodiment, as shown with reference to fig. 5, the first light emitting layer includes a blue light emitting layer 4011. The second light emitting layer comprises a red light emitting layer 4012, the projection area of the blue light emitting layer 4011 covers at least part of the anode layer 300, the second light emitting layer comprises a red light color conversion layer 701, red light is obtained by the red light color conversion layer 701 in the embodiment, the use of a color filter is avoided, the number of evaporated fine masks is further reduced, the production and manufacturing cost is saved, and the power consumption of the device is reduced.

In one embodiment, referring to fig. 6, the first light emitting layer includes a blue light emitting layer 4011, the second light emitting layer includes a green light emitting layer 4013, a projection area of the blue light emitting layer 4011 covers at least a portion of the anode layer 300, and the second light emitting layer includes a green light color conversion layer 702, in this embodiment, green light is obtained from the green light color conversion layer 702, so that a color filter is not used, the number of evaporated fine masks is reduced, and the method is helpful for saving production and manufacturing costs and reducing power consumption of devices.

In one embodiment, the red light color conversion layer 701 contains the dye NPAMLI (2,3-bis- (N, N-1-naphthylphenylamido) -N-methyalmeimide), poly [ 2-methoxy-5- (2' -vinyl-hexyloxy) poly (p-phenylene vinylene)](MEH-PPV), sulfur dyes such as CaS: Eu²⁺、SrS:Eu²⁺Or a nitrogenated dye such as CaAlSiN3 Eu²⁺However, the above dyes may provide better light color conversion effect, and other dyes meeting the requirements may also be used. The red light is obtained through the red light color conversion layer 701, so that the use of a color filter is avoided, the number of vapor deposition fine masks is reduced, the production and manufacturing cost is saved, and the power consumption of the device is reduced.

In one embodiment, the thickness of the red light color conversion layer 701 and the green light color conversion layer 702 is 10nm to 1000nm, but not limited thereto, and the thickness of the red light color conversion layer 701 and the green light color conversion layer 702 can be set according to the requirement, and it is better to set the thickness of the red light color conversion layer 701 and the green light color conversion layer 702 to 10nm to 1000nm, because the thickness is too thin below 10nm, which causes the light conversion efficiency to be low, and the thickness is too thick above 1000nm, which reduces the light extraction rate to some extent. Specifically, the red light color conversion layer 701 and the green light color conversion layer 702 may be set to be, for example, 500nm to 600nm, or 50nm to 100nm, or 600nm to 650nm, or 500nm, or 20nm, or 900nm, and may be set according to practical situations, which is not limited herein, and such setting may further improve the light conversion efficiency thereof. The red light color conversion layer 701 and the green light color conversion layer 702 are mainly prepared by ink jet printing, yellow light process, printing and other methods, but not limited thereto, and other preparation methods meeting the requirements may also be adopted.

In an embodiment, the green light color conversion layer 702 contains one or more dyes selected from xanthene dyes, coumarin dyes and hemicyanine dyes, but not limited thereto, the dyes may provide better light color conversion effect, and other dyes meeting the requirement may also be used. The green light is obtained through the green light color conversion layer 702, so that the use of a color filter is avoided, the number of evaporated fine masks is reduced, the production and manufacturing cost is saved, and the power consumption of the device is reduced.

According to a second aspect of embodiments of the present invention, there is provided an OLED display device including the OLED device according to any one of the above embodiments. Specifically, the display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

In the embodiment of the invention, through the OLED device and the OLED display device, on one hand, the current passing through the blue light emitting layer 401 can be reduced through the series connection structure, so that the service life of the blue light emitting layer 401 is prolonged, the problem of color cast display of the OLED device can be solved to a certain extent, and the service life of the whole display is prolonged; on the other hand, the red light and/or the green light are obtained by the light color conversion layer 700, so that the use of a color filter is avoided, the number of evaporated fine masks is reduced, the production and manufacturing cost is saved, and the power consumption of the device is reduced.

It is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the foregoing description are used for indicating or indicating the orientation or positional relationship illustrated in the drawings, and are used merely for convenience in describing embodiments of the present invention and for simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.