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Cesium lead halide inorganic perovskite quantum dot/transparent polymer composite thin membrane

A technology of composite films and quantum dots, which is applied in the directions of luminescent materials, chemical instruments and methods, can solve the problems of easily destroying the structure of quantum dots, and the luminescence performance of quantum dots is deteriorated, and achieves wide source of raw materials, good practical effects, and low pollution. Effect

Inactive Publication Date: 2019-12-10
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a cesium lead halide inorganic perovskite quantum dot / transparent polymer composite film, to solve the problem that the existing method is easy to destroy the quantum dot structure, resulting in poor luminescence performance of the quantum dot

Method used

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  • Cesium lead halide inorganic perovskite quantum dot/transparent polymer composite thin membrane
  • Cesium lead halide inorganic perovskite quantum dot/transparent polymer composite thin membrane
  • Cesium lead halide inorganic perovskite quantum dot/transparent polymer composite thin membrane

Examples

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Embodiment 1

[0032] The cesium lead halide inorganic perovskite quantum dot / transparent polymer composite film of this embodiment is prepared by the following steps:

[0033] 1) Weigh 0.0734g PbBr 2 , 0.0425g CsBr powder, dissolved in 5mL N,N-dimethylformamide (DMF), stirred for 30min (stirring speed is 200rpm) to fully dissolve; then dropwise added surface ligand oleic acid 0.5mL (OA ) and oleylamine 0.25mL (OAm), stirred for 5min (stirring speed is 200rpm), after being completely dissolved, the precursor solution was obtained;

[0034] 2) Put ethylene-vinyl acetate copolymer (EVA) resin particles and polytetrafluoroethylene circular mold into absolute ethanol for 30 minutes (ultrasonic power 400W), dry and set aside, the diameter of the mold is 1.5mm, and the groove depth is 0.5mm Weigh 1g of EVA resin particles into 10mL of toluene, stir at 70°C for 30min (stirring speed is 200rpm) to fully dissolve to obtain EVA solution.

[0035] 3) Use a dropper to absorb 0.2mL precursor solution, ...

Embodiment 2-5

[0038] The difference between the cesium lead halide inorganic perovskite quantum dot / transparent polymer composite film of this example and the preparation method of Example 1 is that in step 3), the dropping amount of the precursor solution is 0.1mL, 0.4mL , 0.6mL, 0.8mL.

Embodiment 6

[0040] The difference between the cesium lead halide inorganic perovskite quantum dot / transparent polymer composite film of the present embodiment and the preparation method of embodiment 1 is that in step 3), the stirring speed is 300rpm; the temperature of the polymer solution is 80 ℃.

[0041] 2. Comparison ratio

[0042] The difference between the preparation method of the film of the comparative example and that of Example 1 is that in step 3), the amount of the pre-extraction solution added is 0 mL.

[0043] 3. Experimental example

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Abstract

The invention relates to a cesium lead halide inorganic perovskite quantum dot / transparent polymer composite thin membrane, and belongs to the field of preparation of full inorganic perovskite quantumdots. Preparation of the composite thin membrane comprises the following steps that (1) lead halide, cesium halide and a surface ligand are dissolved in a first solvent to prepare a precursor solution; and (2) the precursor solution is dropwise added into a polymer solution under stirring to obtain a colloidal solution, that is the colloidal solution is used for preparing the membrane, the polymer solution is prepared by dissolving the transparent polymer material in a second solvent, and the second solvent is not dissolved in cesium lead halide quantum dots. According to the cesium lead halide inorganic perovskite quantum dot / transparent polymer composite thin membrane provided by the invention, generation of quantum dot and polymer resin in-situ packaging are achieved, the whole technology process is simple, the repeatability is high, pollution in the production process is small, energy consumption is less, the raw material sources are wide, quantity production can be achieved, andthe good practicability effect is achieved.

Description

technical field [0001] The invention belongs to the field of preparation of all inorganic perovskite quantum dots, in particular to a cesium lead halide inorganic perovskite quantum dot / transparent polymer composite film. Background technique [0002] All-inorganic perovskite quantum dots CsPbX 3 (X=Cl,Br,Cl) has attracted great attention in the field of optoelectronics due to its excellent optical properties, such as backlight display, three-color light-emitting diodes, solar cells, photodetectors, and fluorescent probes. Quantum dots (quantum dots, QDs) are nanomaterials defined in a zero-dimensional quantum system, particles that are restricted in three dimensions. Quantum effects include quantum size effects, quantum confinement effects, and surface effects. When the particle size is smaller than a certain value, the electron level near the Fermi level becomes a discontinuous energy level, and the phenomenon of widening the energy gap occurs, and the electrons are bound...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L23/08C08K3/16C09K11/02C09K11/66
CPCC08J5/18C09K11/025C09K11/665C08J2323/08C08K3/16
Inventor 卢红霞马德草张艳艳李明刘建安邵刚范冰冰王海龙陈德良许红亮张锐刘雯
Owner ZHENGZHOU UNIV
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