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Perovskite quantum dot composite film and preparation method thereof

A quantum dot and perovskite technology, which is applied in the field of perovskite quantum dot composite film and its preparation, can solve the problems of low light extraction efficiency, structural decomposition and damage, and decreased luminous efficiency, and achieves good optical stability and process reliability. Strong, simple preparation method

Inactive Publication Date: 2020-02-18
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, perovskite quantum dots are easily affected by oxygen, water vapor and other factors in the external environment, causing their structure to decompose and destroy, resulting in a decrease in luminous efficiency and a shortened lifespan.
Affected by this, the existing light conversion films based on perovskite quantum dots generally have problems such as poor stability and low light extraction efficiency, which cannot meet the requirements for light emission stability in the fields of display and lighting.

Method used

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Embodiment approach

[0032] According to a preferred embodiment of the present application, a method for preparing a perovskite quantum dot composite film is also disclosed, comprising steps:

[0033] S1. Provide precursors, including: perovskite quantum dot glass fibers, and polymers;

[0034] S2. Mixing the precursors at a first temperature at or higher than the melting point of the polymer, and then cooling to obtain a perovskite quantum dot composite film.

[0035] Unlike organic phosphorescent molecules or fluorescent molecules, quantum dots usually have a large specific surface area, resulting in poor stability to light, heat and other environmental factors. In the prior art, high temperature treatment is generally avoided for quantum dots, because this will lead to deterioration of the optical properties and stability of the quantum dots. When preparing quantum dot-based light conversion films, the most common way is to directly disperse quantum dots in a polymer resin solution, and then o...

Embodiment

[0063] Perovskite quantum dot composite film comprising polypropylene and perovskite quantum dot glass fibers dispersed in polypropylene;

[0064] Wherein, the perovskite quantum dot glass fiber comprises a glass matrix and CsPbBr uniformly distributed in the glass matrix 3 Quantum dots, the average diameter of perovskite quantum dot glass fibers is 5 μm.

[0065] Preparation method of perovskite quantum dot composite film:

[0066] S1. Provide precursors, including: perovskite quantum dot glass fiber, and polypropylene;

[0067] Wherein, the preparation of perovskite quantum dot glass fiber comprises steps:

[0068] S1-1, cesium oleate, PbBr 2 , NaBr, SiO 2 , B 2 o 3 , ZnO are thoroughly mixed and ground evenly, calcined and melted in a muffle furnace at 1200°C for 10 minutes, then the calcined liquid is poured on an iron plate to shape, and then transferred to the muffle furnace for annealing at 450°C for 3 hours, and finally at 500°C Complete the crystallization proc...

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Abstract

The invention discloses a perovskite quantum dot composite film which comprises a polymer and perovskite quantum dot glass fibers dispersed in the polymer, wherein the perovskite quantum dot glass fibers comprise a glass matrix and perovskite quantum dots uniformly distributed in the glass matrix. The perovskite quantum dot composite film is high in optical stability, is unlikely to be damaged bythe oxygen, moisture, heat and other factors in the external environment, can still keep high stability in the hot and humid environment; and in addition, the perovskite quantum dot glass fibers and the polymer in the molten state are mixed and cooled to prepare the perovskite quantum dot composite film. The preparation method is simple, the technology is high in reliability, and large-scale production is applicable.

Description

technical field [0001] The present application relates to the field of luminescent materials, in particular to a perovskite quantum dot composite film and a preparation method thereof. Background technique [0002] In the prior art, perovskite quantum dots are generally directly dispersed in polymers, and then prepared into quantum dot-polymer complexes of predetermined shapes for subsequent use. However, perovskite quantum dots are easily affected by oxygen, water vapor and other factors in the external environment, causing their structure to decompose and destroy, resulting in a decrease in luminous efficiency and a shortened lifespan. Affected by this, the existing light conversion films based on perovskite quantum dots generally have problems such as poor stability and low light extraction efficiency, and cannot meet the requirements for light emission stability in the fields of display and lighting. [0003] Therefore, it is necessary to improve the prior art. Conten...

Claims

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Application Information

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IPC IPC(8): B29C41/24B29C41/00B29L7/00B29L11/00
CPCB29C41/003B29C41/24B29L2007/00B29L2011/00
Inventor 徐晓波邢泽咏王允军
Owner SUZHOU XINGSHUO NANOTECH CO LTD