Preparation method and application of flexible large-area full-inorganic perovskite waterproof luminescent fiber membrane

Abstract

The invention belongs to the technical field of luminescent materials, and particularly relates to a preparation method and application of a flexible large-area all-inorganic perovskite waterproof luminescent fiber membrane.The preparation method comprises the steps that firstly, metal halide BX2 and inorganic halide salt AX are dissolved in an organic solvent to obtain an all-inorganic perovskite ABX3 precursor solution; injecting the precursor solution into a polymer resin solution to prepare a spinning solution 1; adding a cyclodextrin additive and fluorine-containing silane into the spinning solution 1 to prepare a spinning solution 2; and finally, spinning the spinning solution 2 through an electrostatic spinning technology to prepare the large-area fiber membrane. The preparation method provided by the invention has the advantages of easily available raw materials, simple operation, good controllability, high repetition rate and the like, and is beneficial to industrial preparation of the large-area luminescent fiber membrane. The obtained all-inorganic perovskite luminescent fiber membrane has high luminous efficiency, has extremely high stability in polar solvents such as water and the like, and can still emit light stably even in water.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a preparation method and application of a flexible large-area all-inorganic perovskite waterproof luminescent fiber film. Background technique [0002] Due to their excellent properties such as tunable band gap, high absorption coefficient, high fluorescence quantum yield, high color purity, high carrier mobility, and long carrier diffusion distance, perovskite materials are widely used in light-emitting and display lighting devices, It shows attractive application prospects in solar cells, detection imaging, etc. Among many perovskite luminescent materials with different compositions, all-inorganic perovskite quantum dots have the advantages of high luminescence efficiency, easy regulation of luminescence wavelength, and narrow half-peak width, making them a star material for luminescence and display devices. Currently, all-inorganic perovskite materia...

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Problems solved by technology

However, the inorganic perovskite materials or films prepared by this method have many defects, for example, they are easily degraded in high humidity environment and other harsh conditions (such as polar solvents), which seriously affects the luminescence of such materials. performance and stability

However, there has been no report on the preparation of all-inorganic perovskite materials by electrospinning

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