A method of obtaining formamidine lead bromide/pmma composite material by in-situ polymerization coating and its application

A technology of in situ polymerization, composite materials, applied in nanotechnology, luminescent materials, chemical instruments and methods for materials and surface science, etc., can solve the problem of quantum dot luminous efficiency decline, perovskite quantum dot agglomeration, limited commercial Chemical applications and other issues, to achieve the effects of excellent light transmittance and stability, excellent stability, and excellent mechanical properties
CN110105481BActive Publication Date: 2021-07-23HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2021-07-23

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Abstract

The invention discloses a method for obtaining formamidine lead bromide / PMMA composite material by in-situ polymerization coating and its application. Firstly, high-quality formamidine lead bromide quantum dots are synthesized by a thermal injection process, and acetonitrile and toluene are used to Purify the quantum dots; secondly, mix the quantum dots and MMA solution in a certain proportion, react for a period of time under light conditions and polymerize to obtain a fluid product with a certain viscosity; finally, prepare a uniform green fluorescent film by scraping film method. The formamidine lead bromide / PMMA composite material of the invention can be used to construct white light LEDs. The invention can prepare formamidine lead-bromine quantum dot composite film material resistant to water and oxygen, and can obtain high-efficiency white light LED devices.
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Description

technical field

[0001] The invention relates to a method for compounding formamidine lead halide perovskite quantum dots with polymer monomers to prepare a uniform film, and using the quantum dot / polymer composite product as a luminescent material to construct an efficient white LED device Background technique

[0002] Under the premise that the International Telecommunication Union proposed the new ultra-high-definition display standard Rec. Look for other luminescent materials (wavelength 525nm-535nm, half maximum width less than 25nm) to replace. Perovskite quantum dots have received extensive attention since they were reported by Kovaleno in 2015 due to their excellent properties such as high quantum yield, narrow half-peak width, strong light absorption ability, and tunable emission wavelength, and their luminescent properties have been continuously improved. and applied to optical devices.

[0003] However, due to its ionic crystal properties, perovskite quantum dots...

Claims

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