Chen Yang
(, ), Yuhuan Tan
(, ), Zheyi Li
(, ), Shan Liang
(, ), Xi-Hua Guan
(, ), Zhong-Jian Yang
(, ), Shixun Lian
(, ), Wenli Zhou
(, )
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Fabricating Au@SiO<sub>2</sub>/fluoride nanocomposites, we investigated how the SiO<sub>2</sub> spacer layer thickness, Au@SiO<sub>2</sub> 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.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":"68 4","pages":"1047 - 1056"},"PeriodicalIF":6.8000,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Modulating luminescence of K3AlF6:Mn4+ NCs via charge compensation and localized surface plasmon resonance effect\",\"authors\":\"Chen Yang \\n (, ), Yuhuan Tan \\n (, ), Zheyi Li \\n (, ), Shan Liang \\n (, ), Xi-Hua Guan \\n (, ), Zhong-Jian Yang \\n (, ), Shixun Lian \\n (, ), Wenli Zhou \\n (, )\",\"doi\":\"10.1007/s40843-024-3271-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The reduction in photoluminescence efficiency due to crystallite downsizing is a significant issue in Mn<sup>4+</sup> -doped fluoride nanomaterials, crucial for their application in full-color micro-LED displays. This study presents a strategy to enhance the photoluminescence efficiency of K<sub>3</sub>AlF<sub>6</sub>:Mn<sup>4+</sup> nanocrystals (NCs) by incorporating Mg<sup>2+</sup> for charge compensation and utilizing the plasmonic effect of Au nanorods. We found that Mg<sup>2+</sup> incorporation effectively reduced lattice defects, increasing photoluminescence intensity by 17% and internal quantum efficiency from 22.37% to 27.56%. Fabricating Au@SiO<sub>2</sub>/fluoride nanocomposites, we investigated how the SiO<sub>2</sub> spacer layer thickness, Au@SiO<sub>2</sub> 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. 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Modulating luminescence of K3AlF6:Mn4+ NCs via charge compensation and localized surface plasmon resonance effect
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.
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.
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