Small organic molecule luminescent material ink and preparation method thereof

A luminescent material and small molecule technology, applied in the field of inkjet printing, can solve problems affecting device performance and prone to phase separation, and achieve the effects of improving thickness uniformity, inhibiting dewetting, and increasing resistance

Active Publication Date: 2019-03-15
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the small molecule / polymer blend system, due to the difference in surface energy and solubility in solution, phase separation is prone to occur during film formation, which affects device performance.

Method used

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  • Small organic molecule luminescent material ink and preparation method thereof
  • Small organic molecule luminescent material ink and preparation method thereof
  • Small organic molecule luminescent material ink and preparation method thereof

Examples

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preparation example Construction

[0043] The present invention also provides a method for preparing the above-mentioned organic small molecule luminescent material ink, comprising the following steps:

[0044] A) after mixing the solute with the first solvent, a mixed solution is obtained;

[0045] B) Adding the second solvent into the mixed solution and mixing to obtain the organic small molecule luminescent material ink.

[0046] Specifically, according to the formula, first weigh the solute and put it in the container, then weigh the first solvent and add it to the container to form a mixed solution, then weigh the second solvent and put it into the above mixed solution to stir. After completely dissolving, the organic Small molecule luminescent material ink.

[0047] Wherein, the mixing temperature of the second solvent and the mixed solution is 20-60°C, preferably at room temperature, and in the present invention, the room temperature is defined as 25±5°C.

[0048] The invention provides an ink for impr...

Embodiment 1

[0051] Weigh 1.92 mg of H2 and place it in the container, then weigh 0.58 mg of Ir(mppy)3 and place it in the container, then weigh 0.6 milliliters of cyclohexanone and add it to the container to form a mixed solution, then weigh 0.4 milliliters of cyclohexyl Benzene is put into the above mixed solution, stirred at room temperature, and after being completely dissolved, an organic small molecule luminescent material solution is obtained that uses a triple line fixing solvent to improve the film-forming properties of the printed organic small molecule luminescent material and a blending solvent to improve the uniformity of the film .

[0052] figure 1 It is H2 in embodiment 1: Ir (mppy) 3 solution inkjet printing is deposited in the H2 in the confinement channel: Ir (mppy) 3 The optical micrograph of thin film, figure 2 Is H2 in embodiment 1: Ir (mppy) 3 solution inkjet printing is deposited into the H2 in the confinement trench: Ir (mppy) The cross-sectional height map of th...

Embodiment 2

[0054] Weigh 1.2 mg of H2 and place it in the container, then weigh 0.3 mg of Ir(mppy)3 and place it in the container, then weigh 0.6 milliliters of acetophenone and add it to the container to form a mixed solution, then weigh 0.4 milliliters of dichloro Benzene is put into the above mixed solution, stirred at room temperature, and after being completely dissolved, an organic small molecule luminescent material solution is obtained that uses a triple line fixing solvent to improve the film-forming properties of the printed organic small molecule luminescent material and a blending solvent to improve the uniformity of the film .

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Abstract

The invention provides ink with filming property improved through a three-phase-line fixing solvent, wherein the ink is printed with a small organic molecule luminescent material. The ink is characterized in that a printed small molecule film is subjected to three-phase line fixation in the injected ink printing solution drying process by the swelling of a PEDOT film through a first solvent, so that the nucleation dewetting caused by backward moving of a three phase line of the film can be inhibited, and the ink filming property can be improved; a second solvent is high in boiling point and low in volatility in the process of drying after the injected ink is printed to a substrate, so that the capillary flowing driving force is reduced; the second solvent is high in viscosity, thus the capillary flowing resistance is increased, and as a result, the capillary flowing intensity is reduced; the solute distribution uniformity is improved; the edge settlement strength is reduced; and the purpose of printing the uniformity of a deposited organic luminescent film of the injected ink can be achieved.

Description

technical field [0001] The invention belongs to the technical field of inkjet printing, and in particular relates to an organic small molecule light-emitting material ink and a preparation method thereof. Background technique [0002] Organic small molecule optoelectronic materials have the characteristics of definite molecular structure, monodispersity, easier purification and stable batch performance, and are compatible with solution printing processing methods, showing stronger applicability to practical applications. Adopting a suitable patterning processing method is an important factor to take advantage of the above advantages and realize the application of organic small molecule materials in organic light-emitting flat panel displays. Inkjet printing is considered to be the most effective method for patterning organic optoelectronic thin films due to its outstanding features such as high efficiency, low cost, suitable for flexible substrates and roll-to-roll printing....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/36C09D11/38
CPCC09D11/36C09D11/38
Inventor 韩艳春于新红邢汝博
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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