Application of polyion liquid in preparation of perovskite quantum dots and preparation method of perovskite quantum dots

By using polyion liquid as ligand in the preparation of perovskite quantum dots, the problem of poor stability of perovskite quantum dots is solved, and higher stability and optical performance are achieved.

CN119709178AActive Publication Date: 2025-03-28HENAN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202411940420.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-28
Estimated Expiration
2044-12-26

AI Technical Summary

Technical Problem

The perovskite quantum dots prepared by the existing ligand-assisted reprecipitation method have poor stability and are easily affected by factors such as moisture, oxygen, and temperature, resulting in structural degradation and photoluminescence performance.

Method used

Polyionic liquid is used as a ligand. During the preparation of perovskite quantum dots, the halogen in the polyionic liquid participates in the formation of quantum dots and is coated on the surface of the quantum dots to improve stability.

Benefits of technology

Through the coating of polyion liquid, the surface defects of perovskite quantum dots are reduced, their stability and optical properties are improved, and their service life is extended.

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Abstract

The invention relates to the technical field of quantum dot materials, in particular to application of polyion liquid in preparation of perovskite quantum dots and a preparation method of the perovskite quantum dots. The invention provides application of polyion liquid in preparation of perovskite quantum dots. The polyion liquid has a structural formula as shown in a formula I or a formula II. Wherein n in the formula I and the formula II is independently selected from integers from 10 to 15. According to the method, the polyion liquid is used as a ligand, halogen in the polyion liquid participates in synthesis of the quantum dots in the re-precipitation process, and the polyion liquid is more firmly wrapped on the surfaces of the perovskite quantum dots, so that the surface defects of the perovskite quantum dots are reduced, and the stability of perovskite is improved.
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