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A quantum dot dispersion, backlight module and display device

A technology for quantum dots and dispersions, applied in the field of quantum dot dispersions, can solve the problems of quantum dot stability and optical performance deterioration, and achieve the effects of good optical performance, reduced preparation cost, and avoidance of agglomeration

Active Publication Date: 2017-06-09
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the modification of organic ligands tends to cause the problem of deterioration of the stability and optical properties of quantum dots themselves.

Method used

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  • A quantum dot dispersion, backlight module and display device
  • A quantum dot dispersion, backlight module and display device
  • A quantum dot dispersion, backlight module and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of carboxyl-modified Tween 20: Mix Tween 20 and succinic anhydride at a molar ratio of 1:1, stir at 80°C for 12 hours, wash and remove Tween 20 and succinic anhydride that have not participated in the reaction, and obtain carboxyl-modified Tween 20, referred to as TD20-COOH.

[0049] Preparation of Tween 20 modified cadmium selenide quantum dots TD20‐COOH‐QD: Take 10ml cadmium selenide quantum dots (25mg / ml) in a bottle, add 2.616g TD20‐COOH (1308g / mol), and add 100ml chloroform, Stir for 10min, add 2.66ml triethylamine (101g / mol), rotary evaporate chloroform; add water to dissolve, form clear solution; wash above-mentioned clear solution twice with chloroform; Remove remaining chloroform by vacuum distillation; Quantum dots; filter the clear liquid, pump out the water at 50°C; the filtrate is TD20‐COOH‐QD. The filtrate was dissolved in chloroform to obtain a clear and transparent TD20‐COOH‐QD chloroform solution.

[0050] Preparation of quantum dot disper...

Embodiment 2

[0052] Same as Example 1, the difference is that TD20-COOH-QD containing 5mg QD is mixed with 500mg shadowless glue.

Embodiment 3

[0054] Same as Example 1, the difference is that TD20-COOH-QD containing 10mg QD is mixed with 500mg shadowless glue.

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Abstract

The invention discloses a quantum dot dispersion, which comprises quantum dots and an optical transparent polymer material, wherein the quantum dots are dispersed in the optical transparent polymer material, one or more ligands are decorated on the surfaces of the quantum dots, and comprise polyethylene glycol chain segments. The quantum dots are uniformly dispersed in the optical transparent polymer material through excellent dispersibility between the polyethylene glycol chain segments and the optical transparent polymer material, thereby forming steady quantum dot dispersion. The invention further discloses a method for preparing the quantum dot dispersion, a lighting device, a backlight module and a display device.

Description

technical field [0001] The present invention relates to a quantum dot dispersion. [0002] The invention also relates to a backlight module and a display device comprising the quantum dot dispersion. Background technique [0003] Quantum dots, also known as nanocrystals, are materials with a size of several nanometers, usually in the range of 1-20 nanometers, and a crystalline structure. Quantum dots can fluoresce when excited by an appropriate light source or voltage. Quantum dots have been extensively studied in the past two decades due to their special properties, such as size-tunable optical properties, high quantum efficiency, relatively narrow half-width, and resistance to photodegradation. As a new generation of luminescent materials, quantum dots are gradually emerging in LED display applications. The quantum dot material can effectively improve the color gamut of the backlight module by absorbing blue light in some bands and excite green light and red light in so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357
CPCG02F1/1336G02F1/133614
Inventor 王允军席玉坤方龙魏登科
Owner SUZHOU XINGSHUO NANOTECH CO LTD