Modulating luminescence of K3AlF6:Mn4+ NCs via charge compensation and localized surface plasmon resonance effect

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2025-03-11 DOI:10.1007/s40843-024-3271-5

Chen Yang (, ), Yuhuan Tan (, ), Zheyi Li (, ), Shan Liang (, ), Xi-Hua Guan (, ), Zhong-Jian Yang (, ), Shixun Lian (, ), Wenli Zhou (, )

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引用次数: 0

Abstract

The reduction in photoluminescence efficiency due to crystallite downsizing is a significant issue in Mn⁴⁺ -doped fluoride nanomaterials, crucial for their application in full-color micro-LED displays. This study presents a strategy to enhance the photoluminescence efficiency of K₃AlF₆:Mn⁴⁺ nanocrystals (NCs) by incorporating Mg²⁺ for charge compensation and utilizing the plasmonic effect of Au nanorods. We found that Mg²⁺ incorporation effectively reduced lattice defects, increasing photoluminescence intensity by 17% and internal quantum efficiency from 22.37% to 27.56%. Fabricating Au@SiO₂/fluoride nanocomposites, we investigated how the SiO₂ spacer layer thickness, Au@SiO₂ resonance wavelength, and relative concentration affect photoluminescence properties. Optimizing the balance between Purcell and Förster resonance energy transfer effects further increased photoluminescence intensity by 25%, internal quantum efficiency to 32.09%, and external quantum efficiency from 14.20% to 18.05%. Additionally, we assessed the potential application of these nanocomposites in micro-LED display technology by examining nanocomposite-PMMA films. This work provides insights into the development of highly efficient red-emitting nanomaterials.

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.