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Determination method of quantum dot surface ligand content and quantum dot ink preparation method

A technology of surface ligands and quantum dots, applied in the field of quantum dots, can solve problems such as low pixel resolution, uneven panel quality, and affecting the quality of the light-emitting layer film, and achieve the effect of strong operability and simple method

Active Publication Date: 2022-03-01
TCL CORPORATION
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Problems solved by technology

If there are too few ligands on the surface of the quantum dots, the quantum dots are not easy to dissolve in the ink solvent, so inkjet printing cannot be performed
If the surface ligand exchange rate of different batches of quantum dots is different, the solubility, drying rate and coffee ring effect of the quantum dot ink will also be different, which will affect the quality of the light-emitting layer film, which directly leads to the printing of the panel. Uneven quality, low pixel resolution, turn-on voltage, uneven photoelectric efficiency, etc.

Method used

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Examples

Experimental program
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Embodiment 1

[0044] 1. Determine the content of special elements in the surface ligands of standard CdZnS / ZnS quantum dots. The surface ligand of CdZnS / ZnS quantum dots is octadecyl phosphoric acid. Take 1.00, 4.00, 8.00, 12.00, 16.00, 20.00 ml phosphorus ICP standard solutions respectively, and dilute them with 5% hydrochloric acid solution to obtain 0.01, 0.03, 0.05, 0.07, 0.1mmol / ml standard solutions. Measure the P atomic emission intensity of the standard elements in the standard solution with different concentrations, and then draw the standard curve with the concentration of the solution as the abscissa and the atomic emission intensity as the ordinate.

[0045] Accurately weigh 10 mg of the quantum dot sample in a 50 ml beaker with an electronic balance, add a small amount of water to moisten it, then add 6 ml of perchloric acid, 12 ml of nitric acid and / or 15 ml of aqua regia, let it stand for 0.5 h, and place it Digest in a heating mantle digestion apparatus for 20 minutes until...

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PUM

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Abstract

The invention proposes a method for measuring ligand content on the surface of quantum dots and a method for preparing quantum dot ink. Using this method to configure the quantum dot ink can ensure the uniformity of the quality of the quantum dot ink, and can ensure that the solubility, drying rate and coffee ring effect of different batches of quantum dot ink are the same, and can improve the pixel resolution of the quantum dot display panel. , Uniformity of lighting voltage and photoelectric efficiency.

Description

technical field [0001] The invention relates to the technical field of quantum dots, in particular to a preparation method of quantum dot ink. Background technique [0002] Quantum dots refer to semiconductor nanocrystals whose geometric size is smaller than their excitonic Bohr radius. Quantum dots have great potential applications in the fields of biomedicine, environmental energy, and lighting display due to their excellent optical properties such as absorption bandwidth, narrow fluorescence emission band, high quantum efficiency, and good photostability. The display technology based on quantum dot luminescence has been highly valued by the display industry in recent years. Compared with liquid crystal display and organic light-emitting display, quantum dot luminescence has a wider color gamut, higher color purity, simpler structure, and higher stability. It is considered It is a new generation display technology. [0003] The fabrication techniques of quantum dot displ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/73
Inventor 覃辉军叶炜浩杨一行
Owner TCL CORPORATION
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