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A kind of all-inorganic perovskite quantum dot multicolor luminescent film and preparation method thereof

A technology of inorganic calcium and quantum dots, applied in semiconductor devices, electrical components, circuits, etc., can solve problems such as dispersion loss, LED color drift, and inconsistent attenuation speed

Active Publication Date: 2020-11-13
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has the following problems: (1) due to the long-term excitation of the phosphor, the luminous characteristics of the material are weakened, resulting in attenuation of the output luminance; (2) due to the relatively large particle size of the phosphor, which is generally micron, this will cause dispersion loss , affecting the improvement of light efficiency; (3) Due to the difference in the three primary color phosphor materials, the attenuation speed is inconsistent, resulting in the drift of LED color parameters

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  • A kind of all-inorganic perovskite quantum dot multicolor luminescent film and preparation method thereof

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[0031] In addition, the present invention also provides a method for preparing an all-inorganic perovskite quantum dot multicolor luminescent film, which includes the following steps:

[0032] Step S1: the inorganic halide PbX 2 Mixed with CsX, completely dissolved in N,N-dimethylformamide, where X is Cl, Br or I, PbX 2 The concentration of CsX is 0.05mol / L~0.5mol / L, the concentration of CsX is 0.05mol / L~0.5mol / L, and the all-inorganic perovskite quantum dots (CsPbX 3 ) precursor solution;

[0033] Step S2: Mix the polymer and N,N-dimethylformamide evenly at a mass ratio of 1:5 to 1:25, and add a silicone resin, the amount of the silicone resin added to the mass ratio of the polymer is 0.01:1~0.08:1, stir evenly to obtain polymer solution;

[0034] Step S3: the all-inorganic perovskite quantum dot (CsPbX 3 ) precursor solution was added to the polymer solution in step S2, and stirred evenly to obtain all-inorganic perovskite quantum dots (CsPbX 3 ) coating solution;

[0...

Embodiment 1

[0038] Step S1: the inorganic halide PbBr 2Mixed with CsBr completely dissolved in the first part of N,N-dimethylformamide, PbBr 2 The concentration of CsBr is 0.05mol / L, and the concentration of CsBr is 0.05mol / L. Stir evenly to obtain all-inorganic CsPbBr 3 perovskite quantum dot precursor solution, while the inorganic halide PbI 2 Mix with CsI Dissolve completely in the second part of N,N-dimethylformamide, PbI 2 The concentration of CsPbI is 0.05mol / L, and the concentration of CsI is 0.05mol / L. Stir evenly to obtain all-inorganic CsPbI 3 Perovskite quantum dot precursor solution;

[0039] Step S2: Mix polytetrafluoroethylene (PTFE) and N,N-dimethylformamide evenly in a mass ratio of 1:5, and add polymethyl silicone resin in an amount equal to that of polytetrafluoroethylene (PTFE) The mass ratio is 0.01:1, and the polytetrafluoroethylene (PTFE) solution is obtained by stirring evenly, and two parts of polytetrafluoroethylene (PTFE) solutions are prepared simultaneously...

Embodiment 2

[0043] Step S1: the inorganic halide PbBr 2 Mixed with CsBr completely dissolved in the first part of N,N-dimethylformamide, PbBr 2 The concentration of CsPbBr is 0.1mol / L, and the concentration of CsBr is 0.1mol / L. Stir evenly to obtain all-inorganic CsPbBr 3 perovskite quantum dot precursor solution, while the inorganic halide PbI 2 Mix with CsI Dissolve completely in the second part of N,N-dimethylformamide, PbI 2 The concentration of CsPbI is 0.1mol / L, and the concentration of CsI is 0.1mol / L. Stir evenly to obtain all-inorganic CsPbI 3 Perovskite quantum dot precursor solution;

[0044] Step S2: Mix polyvinylidene fluoride (PVDF) and N,N-dimethylformamide in a mass ratio of 1:10, and add polyethyl silicone resin in an amount equal to that of polytetrafluoroethylene (PTFE) The mass ratio is 0.04:1, and the polyvinylidene fluoride (PVDF) solution is obtained by stirring evenly, and two parts of polyvinylidene fluoride (PVDF) solutions are prepared simultaneously;

[00...

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Abstract

The invention discloses an all-inorganic perovskite quantum dot multi-color light emitting film, comprising a transparent substrate and an all-inorganic perovskite quantum dot layer coating one surface of the transparent substrate. The components and the additive volumes of the all-inorganic perovskite quantum dot layer are: in parts by weight, 0.1 to 1.2 parts of all-inorganic perovskite quantumdots, 5 to 25 parts of a polymer and 0.05 to 2 parts of silicone resin. The formula is simple, the preparation is simple, the prepared all-inorganic perovskite quantum dot multi-color light emitting film is obviously better than the existing LED structure in terms of light emitting efficiency, production cost and industrial production convenience, and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of thin film technology, in particular to a quantum dot multicolor luminescent film and a preparation method thereof. Background technique [0002] In recent years, with the global energy crisis and the gradual enhancement of people's awareness of energy conservation and environmental protection, a large number of energy-saving and environmentally friendly materials have entered our lives. Semiconductor light-emitting diodes (LEDs) are gradually replacing traditional lighting materials and becoming the third-generation lighting source due to their advantages of energy saving, less heat generation, long life, and high luminous efficiency. [0003] In the preparation of white light LED mainstream products for lighting functions, since a single LED chip cannot emit white light with a continuous spectrum, two or more complementary colors of light must be mixed to form white light. Currently, there are three main methods f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/50
Inventor 黄永华王增敏李彩翠张运波
Owner HEFEI LUCKY SCI & TECH IND
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