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Polymer thermal activation delayed fluorescence material ink for ink-jet printing, preparation method thereof and ink-jet printing method

A heat-activated delay and inkjet printing technology, applied in the direction of copying/marking method, application, printing, etc., can solve the problem of uneven film thickness, etc., achieve the effect of improving film forming quality, reducing solvent residue, and overcoming coffee ring effect

Active Publication Date: 2020-09-25
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

[0003] Inkjet printing technology is a non-contact printing technology, which has the advantages of saving materials, no mask, and easy operation. However, in the process of inkjet printing film formation, there is often a "coffee ring" effect, that is, the film The thickness of the edge is greater than the thickness of the center of the film, making the film thickness uneven

Method used

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  • Polymer thermal activation delayed fluorescence material ink for ink-jet printing, preparation method thereof and ink-jet printing method
  • Polymer thermal activation delayed fluorescence material ink for ink-jet printing, preparation method thereof and ink-jet printing method
  • Polymer thermal activation delayed fluorescence material ink for ink-jet printing, preparation method thereof and ink-jet printing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Weigh 2.5 milligrams of P-Ac95-TRZ05 and place it in a container, then weigh 0.6 milliliters of cyclohexanone and add it to the container to form a mixed solution, then weigh 0.2 milliliters of cumene and 0.2 milliliters of cyclohexylbenzene, Put into the above mixed solution, wherein the first solvent content is 61.0%, the second solvent content is 18.3%, the third solvent content is 20.4%, and the solute content is 0.3%. After stirring at room temperature and completely dissolving, the polymer thermally activated delayed fluorescent material ink for inkjet printing is obtained.

[0051] figure 1 Be that the P-Ac95-TRZ05 ink jet printing that embodiment 1 prepares is deposited in the optical microscope image of the P-Ac95-TRZ05 thin film in the restriction channel (the left figure is an optical microscope image, and the right figure is a fluorescence microscope image), figure 2 It is the cross-sectional height map of the P-Ac95-TRZ05 film deposited in the restriction...

Embodiment 2

[0053] Weigh 2.5 mg of P-Ac95-TRZ05 and place it in a container, then weigh 0.5 ml of chlorobenzene and add it to the container to form a mixed solution, then weigh 0.3 ml of cumene and 0.2 ml of cyclohexylbenzene, put In the above mixed solution, the first solvent content is 55.1%, the second solvent content is 25.8%, the third solvent content is 18.9%, and the solute content is 0.2%. After stirring at room temperature and completely dissolving, a polymer heat-activated delayed fluorescent material ink suitable for inkjet printing and capable of improving the uniformity of the printed film is obtained.

Embodiment 3

[0055] Weigh 3 mg of P-Ac95-TRZ05 and place it in a container, then weigh 0.5 milliliters of o-xylene and add it to the container to form a mixed solution, then weigh 0.3 milliliters of isopropyltoluene and 0.2 milliliters of chloronaphthalene, put into the above mixed solution, wherein the first solvent content is 46.9%, the second solvent content is 27.3%, the third solvent content is 25.5%, and the solute content is 0.3%. After being stirred at room temperature and completely dissolved, an organic small molecule light-emitting material ink suitable for inkjet printing and capable of improving the uniformity of the printed film is obtained.

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Abstract

The invention provides polymer thermal activation delayed fluorescent material ink for ink-jet printing. The polymer thermal activation delayed fluorescent material ink comprises 20 wt%-89.9 wt% of afirst solvent, 5 wt%-39.9 wt% of a second solvent, 5 wt%-39.9 wt% of a third solvent, and 0.2 wt%-5wt% of a solute, wherein the sum of the contents of the components is 100%. The first solvent is a low-boiling-point and high-surface-tension organic solvent, the second solvent is a high-boiling-point and low-surface-tension organic solvent, the third solvent is a high-boiling-point and high-viscosity organic solvent, and the solute is a polymer thermal activation delayed fluorescence material which can be dissolved in the first solvent, the second solvent, the third solvent or a mixed solvent thereof. By constructing a three-solvent system, the coffee ring effect of the polymer thermal activation delayed fluorescent material in the process of preparing an organic light-emitting film throughink-jet printing is overcome, and the film forming quality of the printed polymer thermal activation delayed fluorescent material film is improved.

Description

technical field [0001] The invention relates to the technical field of printed electronics, in particular to a polymer thermally activated delayed fluorescent material ink for inkjet printing, a preparation method thereof and an inkjet printing method. Background technique [0002] Organic light-emitting diodes (OLEDs) have attracted widespread attention due to their advantages such as bright colors, no need for backlight, wide viewing angle, thinness, and flexible processing. Thermally activated delayed fluorescent materials have become a hotspot in the research of luminescent materials because of their theoretical value of internal quantum efficiency reaching 100%, and the fact that heavy atoms do not need to be introduced into the molecule like phosphorescent materials, and the synthesis cost is also low. [0003] Inkjet printing technology is a non-contact printing technology, which has the advantages of saving materials, no mask, and easy operation. However, in the proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50C09D11/30C09D11/36B41M5/00H01L51/50H01L51/56
CPCC09D11/50C09D11/30C09D11/36B41M5/0023H10K71/135H10K50/11
Inventor 韩艳春于新红彭忠祥
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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