阅读说明：本技术 墨水组成物及其制造方法、显示器 (Ink composition, manufacturing method thereof and display ) 是由 王士攀 于 2019-11-15 设计创作，主要内容包括：一种墨水组成物及其制造方法、显示器,所述墨水组成物包括0.01％至20％(重量)的电子注入材料；0.1％至20％(重量)的聚亚胺类化合物；0.1％至5％(重量)的表面张力调节剂；0.1％至5％(重量)的黏度调节剂；以及50％至99.69％(重量)的溶剂,透过调整本发明的墨水组成物成分实现目标粘度及表面张力,利用所述墨水作为制备电子注入层的材料,以降低电子注入材料结晶以及提升电子注入层成膜性,达到利于实现全印刷制备器件的效果。(An ink composition, a method of manufacturing the same, and a display, the ink composition including 0.01 to 20 wt% of an electron injecting material; 0.1 to 20% by weight of a polyimine compound; 0.1% to 5% by weight of a surface tension modifier; 0.1 to 5% by weight of a viscosity modifier; and 50 to 99.69 percent (by weight) of solvent, the target viscosity and surface tension are realized by adjusting the components of the ink composition, and the ink is used as a material for preparing the electron injection layer to reduce the crystallization of the electron injection material and improve the film forming property of the electron injection layer, thereby achieving the effect of being beneficial to realizing the preparation of devices by full printing.)

1. An ink composition, comprising:

0.01 to 20% by weight of an electron injecting material;

0.1 to 20% by weight of a polyimine compound;

0.1% to 5% by weight of a surface tension modifier;

0.1 to 5% by weight of a viscosity modifier; and

50% to 99.69% by weight of a solvent.

2. The ink composition of claim 1, wherein the electron injecting material comprises an alkali metal compound.

3. The ink composition of claim 2, wherein the alkali metal compound comprises a group consisting of: alkali metal carbonates, alkali metal acetates, and alkali metal acetylacetones.

4. The ink composition as claimed in claim 1, wherein the polyimine-based compound is polyethyleneimine.

5. The ink composition of claim 1, wherein the surface tension modifier comprises a group consisting of: co-solvents, surfactants, and small molecule compounds.

6. The ink composition of claim 5, wherein the small molecule compound comprises a group consisting of: imidazole, imidazole derivatives, phenol, and hydroquinone.

7. The ink composition of claim 1, wherein the viscosity modifier comprises a group consisting of: alcohols, ethers, esters, phenols, and amines.

8. The ink composition of claim 1, wherein the solvent comprises a primary solvent and a secondary solvent, the primary solvent comprising an alcohol, the secondary solvent comprising the group consisting of: ketones, ethers, esters, and amides.

9. A method for producing an ink composition, comprising:

dissolving an electron injection material and a polyimine compound material in a solvent to obtain a first intermediate product;

adding a surface tension regulator and a viscosity regulator into the first intermediate product to obtain a second intermediate product;

stirring the second intermediate product at 0-80 ℃ for 0.5-24 h to obtain a third intermediate product; and

filtering the third intermediate product to obtain the ink composition;

wherein the ink composition comprises 0.01 to 20 wt% of the electron injecting material, 0.1 to 20 wt% of the polyimide-based compound, 0.1 to 5 wt% of the surface tension modifier, 0.1 to 5 wt% of the viscosity modifier, and 50 to 99.69 wt% of the solvent.

10. A display, comprising:

a substrate;

an anode disposed on the substrate;

a hole injection layer disposed over the anode;

a hole transport layer disposed over the hole injection layer;

a light emitting layer disposed over the hole transport layer;

an electron injection layer disposed over the light emitting layer; and

a cathode disposed over the electron injection layer;

wherein the electron injection layer comprises an ink composition comprising 0.01 to 20 wt% of an electron injection material, 0.1 to 20 wt% of a polyimide-based compound, 0.1 to 5 wt% of a surface tension modifier, 0.1 to 5 wt% of a viscosity modifier, and 50 to 99.69 wt% of a solvent.

[ technical field ] A method for producing a semiconductor device

The disclosure relates to the field of display technologies, and in particular relates to an ink composition, a manufacturing method thereof, and a display.

[ background of the invention ]

Organic electroluminescent diodes (OLEDs) are considered to be the most potential next-generation new flat panel display technology due to their excellent characteristics. Solution processing techniques provide an effective way to produce high performance OLED products at low cost. Since conjugated polymer materials have good processability and film-forming properties and are easy to be processed in solution, Polymer Light Emitting Diodes (PLED) have received much attention from researchers.

To realize a device in a full solution process, a solution processed electron injection layer needs to be further developed. However, most of the current electron injection layer materials are inorganic or complex micromolecule materials, and the problems of poor film forming property and easy crystallization exist.

Therefore, it is desirable to provide an ink composition, a method for manufacturing the same, and a display device, which solve the problems of the prior art.

[ summary of the invention ]

In order to solve the above problems, the present disclosure provides an ink composition, a manufacturing method thereof, and a display, in which the components of the ink composition are adjusted to achieve a target viscosity and a target surface tension, and the ink is used as a material for preparing an electron injection layer, so as to reduce crystallization of the electron injection material and improve film forming property of the electron injection layer, thereby facilitating full-printing preparation of devices.

To achieve the above object, the present disclosure provides an ink composition comprising 0.01 to 20 wt% of an electron injecting material; 0.1 to 20% by weight of a polyimine compound; 0.1% to 5% by weight of a surface tension modifier; 0.1 to 5% by weight of a viscosity modifier; and 50% to 99.69% by weight of a solvent.

In one embodiment of the present disclosure, the electron injection material includes an alkali metal compound.

In one embodiment of the present disclosure, the alkali metal compound comprises the group consisting of: alkali metal carbonates, alkali metal acetates, and alkali metal acetylacetones.

In an embodiment of the present disclosure, the polyimide-based compound is polyethyleneimine.

In one embodiment of the present disclosure, the surface tension modifier comprises the group consisting of: co-solvents, surfactants, and small molecule compounds.

In one embodiment of the present disclosure, the small molecule compound comprises the group consisting of: imidazole, imidazole derivatives, phenol, and hydroquinone.

In one embodiment of the present disclosure, the viscosity modifier comprises a group consisting of: alcohols, ethers, esters, phenols, and amines.

In one embodiment of the present disclosure, the solvent comprises a primary solvent comprising an alcohol and a secondary solvent comprising the group consisting of: ketones, ethers, esters, and amides.

To achieve the above object, the present disclosure also provides a method for manufacturing an ink composition, comprising:

dissolving an electron injection material and a polyimine compound material in a solvent to obtain a first intermediate product;

adding a surface tension regulator and a viscosity regulator into the first intermediate product to obtain a second intermediate product;

stirring the second intermediate product at 0-80 ℃ for 0.5-24 h to obtain a third intermediate product; and

filtering the third intermediate product to obtain the ink composition,

wherein the ink composition comprises 0.01 to 20 weight percent of electron injection material, 0.1 to 20 weight percent of polyimide compound, 0.1 to 5 weight percent of surface tension regulator, 0.1 to 5 weight percent of viscosity regulator and 50 to 99.69 weight percent of solvent.

To achieve the above object, the present disclosure further provides a display device, comprising:

a substrate;

an anode disposed on the substrate;

a hole injection layer disposed over the anode;

a hole transport layer disposed over the hole injection layer;

a light emitting layer disposed over the hole transport layer;

an electron injection layer disposed over the light emitting layer; and

a cathode disposed over the electron injection layer;

wherein the electron injection layer comprises an ink composition comprising 0.01 to 20 wt% of an electron injection material, 0.1 to 20 wt% of a polyimide-based compound, 0.1 to 5 wt% of a surface tension modifier, 0.1 to 5 wt% of a viscosity modifier, and 50 to 99.69 wt% of a solvent.

[ description of the drawings ]

FIG. 1 is a flow chart illustrating a method for manufacturing a micro-ink composition according to an embodiment of the disclosure.

FIG. 2 is a schematic diagram of a display according to an embodiment of the disclosure.

[ detailed description ] embodiments

The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the disclosure may be practiced. Directional phrases used in this disclosure, such as [ upper ], [ lower ], [ front ], [ back ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terms used are used for the purpose of illustration and understanding of the present disclosure, and are not used to limit the present disclosure.

In the drawings, elements having similar structures are denoted by the same reference numerals.

In order to solve the above problems, the present disclosure provides an ink composition, a method for manufacturing the same, and a display, so as to achieve the effects of reducing crystallization of an electron injection material and improving film forming property of an electron injection layer, and facilitate the realization of a device manufactured by full printing.

To achieve the above object, the present disclosure provides an ink composition comprising 0.01 to 20 wt% of an electron injecting material; 0.1 to 20% by weight of a polyimine compound; 0.1% to 5% by weight of a surface tension modifier; 0.1 to 5% by weight of a viscosity modifier; and 50 to 99.69 percent (by weight) of solvent, wherein the viscosity and the surface tension can be adjusted according to the application condition by adjusting the proportion of each solvent component of the ink composition, so as to obtain the electron injection ink composition suitable for printing technology.

In one embodiment of the present disclosure, the electron injection material includes an alkali metal compound. In one embodiment of the present disclosure, the alkali metal compound comprises the group consisting of: alkali metal carbonates (Cs2CO3), alkali metal acetates (CH3COOLi), and alkali metal acetylacetonates (li (acac)) to facilitate electron injection.

In an embodiment of the disclosure, the polyimide compound includes Polyethyleneimine (PEI), which is used to improve film forming property and achieve an effect of inhibiting crystallization of the electron injection material.

In one embodiment of the present disclosure, the surface tension modifier comprises the group consisting of: co-solvents, surfactants, and small molecule compounds. In one embodiment of the present disclosure, the surface tension of the ink composition is 20 to 60 dyne/cm. In one embodiment of the present disclosure, the small molecule compound comprises the group consisting of: imidazole, imidazole derivatives, phenol, and hydroquinone.

In one embodiment of the present disclosure, the viscosity modifier comprises a group consisting of: alcohols, ethers, esters, phenols, and amines. In one embodiment of the present disclosure, the viscosity of the ink composition is 1 to 100 cps.

In one embodiment of the present disclosure, the solvent comprises a primary solvent comprising an alcohol and a secondary solvent comprising the group consisting of: ketones, ethers, esters, and amides, thereby achieving the effects of dissolving the electron injection material and suppressing the destruction of the lower light emitting layer.

Through the embodiment, the ink composition can be used for preparing a printed electron injection layer in a polymer light-emitting diode (PLED) device, further avoids the problems of crystallization and poor film forming property of an electron injection material, and is beneficial to realizing the preparation of a device by full printing.

Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a method for manufacturing a micro ink composition according to an embodiment of the disclosure, and in detail, the method includes:

and a process S1, dissolving the electron injection material and the polyimide compound material in a solvent to obtain a first intermediate product.

And a process S2, adding a surface tension regulator and a viscosity regulator into the first intermediate product to obtain a second intermediate product.

And (S4) stirring the second intermediate product at 0-80 ℃ for 0.5-24 h to obtain a third intermediate product.

Filtering the third intermediate product to obtain the ink composition in a process S5.

Specifically, the ink composition obtained in the method for producing the ink composition comprises 0.01 to 20% by weight of an electron-injecting material, 0.1 to 20% by weight of a polyimide-based compound, 0.1 to 5% by weight of a surface tension adjusting agent, 0.1 to 5% by weight of a viscosity adjusting agent, and 50 to 99.69% by weight of a solvent.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a display according to an embodiment of the disclosure, in which the display 10 includes:

a substrate 100;

an anode 200 disposed on the substrate 100;

a hole injection layer 300 disposed over the anode 200;

a hole transport layer 400 disposed over the hole injection layer 300;

a light emitting layer 500 disposed over the hole transport layer 400;

an electron injection layer 600 disposed over the light emitting layer 500; and

a cathode 700 disposed over the electron injection layer 600;

wherein the electron injection layer 600 comprises an ink composition comprising 0.01 to 20 wt% of an electron injection material, 0.1 to 20 wt% of a polyimide-based compound, 0.1 to 5 wt% of a surface tension modifier, 0.1 to 5 wt% of a viscosity modifier, and 50 to 99.69 wt% of a solvent.

In one embodiment of the present disclosure, the anode 70 is a transparent metal oxide with high work function, and is formed by magnetron sputtering to have a thickness of 20nm to 200 nm. In one embodiment of the present disclosure, the anode 700 is made of ITO and has a thickness of 70 nm.

In an embodiment of the present disclosure, the hole injection layer 200 is made of an organic small molecule or polymer hole injection material, and is formed by an inkjet printing method (IJP) to have a thickness of 1nm to 200 nm; in one embodiment of the present disclosure, the material of the hole injection layer comprises a bulky polymer particle (PEDOT: PSS) and has a thickness of 40 nm.

In one embodiment of the present disclosure, the hole transport layer 400 is made of organic small molecule or polymer hole transport material, and is formed by inkjet printing, with a thickness of 1nm to 100 nm; in one embodiment of the present disclosure, the material of the hole transport layer 400 comprises TFB (1,2,4, 5-tetra (trifluoromethyl) benzene,

1,2,4,5-Tetrakis (fluoromethenyl) -1,2,4, 5-Tetrakis-fluoromethenyl-bezene) with a film thickness of 20 nm.

In one embodiment of the present disclosure, the light-emitting layer 500 comprises a polymer light-emitting material, and is formed by an inkjet printing method, with a thickness of 1-200 nm; in one embodiment of the present disclosure, the light-emitting layer 500 includes PFO and has a thickness of 60 nm.

In an embodiment of the present disclosure, the material of the electron injection layer 600 is a mixture of alkali metal compound and polyimide compound, which are the materials of the electron injection layer ink, and the thickness is 1 to 20 nm. In one embodiment of the present disclosure, the alkali metal compound material is lithium acetylacetonate, the polyimide compound material is polyethyleneimine, and the thickness of the film is 5 nm.

In one embodiment of the present disclosure, the cathode 700 is made of a low work function metal material, a low work function metal alloy, or a transparent metal oxide such as IZO, and is formed by vacuum evaporation to a film thickness of 10nm to 200 nm. In one embodiment of the present disclosure, the cathode 700 is made of aluminum and has a thickness of 150 nm.

As the ink composition, the manufacturing method thereof and the display provided by the present disclosure, the ink composition comprises 0.01 to 20 percent (by weight) of the electron injection material; 0.1 to 20% by weight of a polyimine compound; 0.1% to 5% by weight of a surface tension modifier; 0.1 to 5% by weight of a viscosity modifier; and 50% to 99.69% by weight of a solvent. The ink composition provided by the invention can inhibit crystallization of an electron injection material and improve film forming property of an electron injection layer, thereby achieving the effect of facilitating realization of a device prepared by full printing.

The foregoing is merely a preferred embodiment of the present disclosure, and it should be noted that modifications and refinements may be made by those skilled in the art without departing from the principle of the present disclosure, and these modifications and refinements should also be construed as the protection scope of the present disclosure.