A method for preparing perovskite quantum dot-polymer porous composites

A porous composite material and composite material technology, applied in the field of preparing high-brightness and high-stability perovskite quantum dots-polymer porous composite materials, can solve the problem of large specific surface area, high surface energy and low stability of perovskite quantum dots and other problems, to achieve the effect of easy control of preparation parameters, simple process and high luminous brightness

Active Publication Date: 2022-07-12
NANCHANG UNIV
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Problems solved by technology

However, the formation energy of perovskite materials is low, and perovskite quantum dots have a large specific surface area and high surface energy, and the surface ligands are in dynamic equilibrium, so there are a large number of surface defects, which make them highly sensitive to the external environment. show low stability, which seriously restricts its practical application

Method used

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  • A method for preparing perovskite quantum dot-polymer porous composites
  • A method for preparing perovskite quantum dot-polymer porous composites
  • A method for preparing perovskite quantum dot-polymer porous composites

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Embodiment 1

[0028] Dissolve lead methacrylate in methyl methacrylate (MMA) at a concentration of 6 × 10 -5 mol / mL solution 1mL, at the same time, add 0.03 g of 2-2 azobisisobutyronitrile (AIBN), mix well and filter out large particles with a filter, add the solution dropwise into sugar cubes and vacuum treatment to make the cubes. The air in the sugar is expelled, and the air in the sugar cube is expelled several times, and the solution fills the gap of the sugar cube. Wrap the sugar cube filled with the solution with aluminum foil to avoid loss due to evaporation of the solution. Placed in an oven at 65°C for crosslinking for 12 h. Immerse the cross-linked sugar cube in a large amount of distilled water to dissolve the sugar in it to obtain a polymer, and then vacuum dry the polymer after the sugar cube is dissolved to obtain thermally cross-linked polymethyl methacrylate copolymer lead methacrylate. Porous composites. Afterwards, cesium bromide was dissolved in dimethyl sulfoxide so...

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Abstract

The invention discloses a method for preparing a high-brightness and high-stability perovskite quantum dot-polymer porous composite material, comprising the following steps: S1. preparation of a lead-containing precursor solution, S2. halogenated methylamine, halogenated formamidine, Solution preparation of cesium halide, S3. preparation of lead-containing porous polymer material, S4. preparation of porous perovskite quantum dot-polymer composite material; according to the method of the present invention, it is possible to obtain products with high luminous brightness and good stability Porous perovskite quantum dot-polymer composites.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a method for preparing a high-brightness and high-stability perovskite quantum dot-polymer porous composite material. Background technique [0002] Perovskite quantum dots are a very promising material. Due to their excellent optical properties such as narrow emission spectrum, wide tunable fluorescence emission, high luminous efficiency, and their low cost, they are widely used in light-emitting diodes. , lasers and other high-performance optoelectronic devices have attracted much attention. However, the formation energy of perovskite materials is low, and perovskite quantum dots have large specific surface area and high surface energy, and the surface ligands are in dynamic equilibrium, so there are a large number of surface defects, which make them highly sensitive to the external environment. It shows low stability, which seriously restricts its practical application. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/26C08J9/36C08L33/12C08K3/16C08F220/14C08F220/06C09K11/02C09K11/66B82Y20/00B82Y30/00B82Y40/00
CPCC08J9/26C08J9/36C08F220/14C09K11/025C09K11/665B82Y20/00B82Y30/00B82Y40/00C08J2333/12C08J2201/0422C08K3/16C08F220/06Y02E10/549
Inventor 李璠郭威王晓峰夏雪峰徐翼飞徐光勇李样生
Owner NANCHANG UNIV
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