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Ink for ink-jet printing of luminescent material, luminescent film and application

An inkjet printing, luminescent film technology, applied in applications, inks, household appliances, etc., can solve problems such as reducing device performance, and achieve the effects of material saving, good droplet film formation, and high jetting stability.

Active Publication Date: 2021-01-22
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Inkjet printing technology has the characteristics of high material utilization rate, low preparation cost and patternability, and it is most likely to become a technology to replace vacuum evaporation. However, there are interlayer miscibility problems between functional layers and solvents in the inkjet printing process. Penetration into the underlying functional layer will degrade device performance

Method used

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  • Ink for ink-jet printing of luminescent material, luminescent film and application
  • Ink for ink-jet printing of luminescent material, luminescent film and application
  • Ink for ink-jet printing of luminescent material, luminescent film and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Commercially available small molecule materials TCTA, 26DCZPPY and Ir(ppy) 3 Disperse in the mixed solvent according to the mass ratio of 45:45:10, the mixed solvent is composed of o-dichlorobenzene and chloronaphthalene, and the ink concentration of the light-emitting layer is 10 mg ml -1 , wherein the volume ratio of o-dichlorobenzene and chloronaphthalene in the mixed solvent is 7:3;

[0038]Select glass as the substrate, ultrasonically treat the substrate in acetone, ethanol, and deionized water for 15 minutes, blow dry it with nitrogen, and place it in an oven at 120°C for drying; spin-coat a layer of poly(3,4-substrate) on the surface of the cleaned glass substrate Ethyldioxythiophene): Poly(4-styrene sulfonic acid) (PEDOT:PSS) (AI 4083) film, spin coating speed is 2500rpm, spin coating time is 1 minute, after spin coating is completed, put it on a hot stage at 120°C After annealing for 30 minutes, the thickness of the prepared polymer film was 45nm; then inkjet ...

Embodiment 2

[0040] Commercially available small molecule materials TCTA, 26DCZPPY and Ir(ppy) 3 Disperse in the mixed solvent according to the mass ratio of 45:45:10, the mixed solvent is composed of o-dichlorobenzene and chloronaphthalene, and the ink concentration of the light-emitting layer is 10 mg ml -1 , wherein the volume ratio of o-dichlorobenzene and chloronaphthalene in the mixed solvent is 5:5;

[0041] Select glass as the substrate, ultrasonically treat the substrate in acetone, ethanol, and deionized water for 15 minutes, blow dry with nitrogen, and then place it in an oven at 120°C for drying; spin-coat a layer of PEDOT:PSS (AI 4083) on the surface of the cleaned glass substrate The spin-coating speed is 2500rpm, and the spin-coating time is 1 minute. After the spin-coating is completed, it is annealed on a hot stage at 120°C for 30 minutes. The thickness of the prepared polymer film is 45nm; On the surface of the polymer film, the printing height is 500 μm, the printing ra...

Embodiment 3

[0043] Commercially available small molecule materials TCTA, 26DCZPPY and Ir(ppy) 3 Disperse in the mixed solvent according to the mass ratio of 45:45:10, the mixed solvent is composed of o-dichlorobenzene and chloronaphthalene, and the ink concentration of the light-emitting layer is 10 mg ml -1 , wherein the volume ratio of o-dichlorobenzene and chloronaphthalene in the mixed solvent is 2: 8;

[0044] Select glass as the substrate, ultrasonically treat the substrate in acetone, ethanol, and deionized water for 15 minutes, blow dry with nitrogen, and then place it in an oven at 120°C for drying; spin-coat a layer of PEDOT:PSS (AI 4083) on the surface of the cleaned glass substrate The spin-coating speed is 2500rpm, and the spin-coating time is 1 minute. After the spin-coating is completed, it is annealed on a hot stage at 120°C for 30 minutes. The thickness of the prepared polymer film is 45nm; On the surface of the polymer film, the printing height is 500 μm, the printing r...

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Abstract

The invention discloses ink for an ink-jet printing luminescent material, a luminescent film and application. The solute of the ink comprises 4, 4', 4''-tri(carbazole-9-yl) triphenylamine, 2, 6-bis (((9H-carbazole-9-yl)-3, 1-phenylene) pyridine and tri-(2-phenylpyridine) iridium (III), and a solvent comprises o-dichlorobenzene and chloronaphthalene. According to the formula, an organic small molecule material light emitting film is subjected to ink-jet printing on the surface of a thermally cross-linked hole transport layer, such that the problem of inter-layer intersolubility and the problemof permeation of the solvent into a bottom functional layer can be solved, and a multi-layer structure OLED device with a clear interface is prepared through ink-jet printing; and the ink and the luminescent film have the advantages of easiness in material component control, flexible pattern design, large-scale production, compatibility with flexible device preparation and is suitable for large-area and low-cost OLED application.

Description

technical field [0001] The invention relates to a luminescent material and its preparation method and application, in particular to an inkjet printing luminescent film and its preparation method and application. Background technique [0002] Organic light-emitting diodes are a new generation of display technology due to their characteristics of self-illumination, thinness, low power consumption, high contrast ratio, flexibility and bendability. The manufacture of traditional OLEDs is achieved through vacuum deposition processes, but this technology requires a strict vacuum environment and high-precision masks, and the material utilization rate is only 20%, so it is difficult to achieve mass production of low-cost, large-size OLEDs . [0003] In order to overcome the limitations of the vacuum process, solution processes that can realize low-cost, large-scale OLED mass production, including inkjet printing, spray coating, doctor blade coating, and screen printing, have attrac...

Claims

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Application Information

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IPC IPC(8): C09D11/50C09D11/328C09D11/52C09D11/36C09D11/38H01L51/00H01L51/50
CPCC09D11/50C09D11/328C09D11/52C09D11/36C09D11/38H10K71/135H10K50/11
Inventor 刘利会陈定甫谢炬炫陈淑芬黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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