Highly efficient and tunable dual-band photoluminescence from CsBr: Mn2+ nanocrystals embedded in glasses

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-02-25 DOI:10.1016/j.jallcom.2025.179434

Shasha He , Jiahui Wei , Yudong Zhang , Yunlan Guo , Wenke Li , Jong Heo , Chao Liu

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引用次数: 0

Abstract

Cesium lead halide perovskite nanocrystals (NCs) have been intensively investigated for wide applications due to their particular optoelectronic properties. In order to reduce to the environmental load of toxic lead ions in these perovskite NCs, lead-free CsBr NCs are precipitated in glasses through melt-quenching and subsequent thermal treatment. Incorporation of Mn²⁺ ions into these CsBr NCs leads to highly efficient green and red photoluminescence (PL), and the dual-band PL is further modulated by adjusting the doping concentration of MnBr₂ in the glasses and heat-treatment conditions, leading to maximum PL quantum yield of 73 %. PL excitation spectra and PL decay dynamics of these CsBr: Mn²⁺ NCs embedded in glasses show that the Suzuki phase formed by Mn-related aggregates/precipitates are responsible for the green PL and interaction between these aggregates/precipitates results in the red PL. These results demonstrate that glasses containing CsBr: Mn²⁺ NCs are promising environment-friendly luminescence materials.

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嵌入玻璃中的CsBr: Mn2+纳米晶体的高效可调谐双波段光致发光

铯-卤化铅-钙钛矿纳米晶体（NCs）由于其独特的光电特性而得到了广泛的应用。为了减少这些钙钛矿NCs中有毒铅离子的环境负荷，通过熔融淬火和随后的热处理将无铅CsBr NCs析出到玻璃中。将Mn2+离子掺入到这些CsBr NCs中可以产生高效的绿色和红色光致发光（PL），并且通过调整玻璃中MnBr2的掺杂浓度和热处理条件进一步调制双带PL，使PL的最大量子产率达到73%。这些镶嵌在玻璃中的CsBr: Mn2+ NCs的激发光谱和PL衰减动力学表明，由mn相关聚集体/沉淀形成的Suzuki相负责绿色PL，这些聚集体/沉淀之间的相互作用导致红色PL。这些结果表明，含有CsBr: Mn2+ NCs的玻璃是有前途的环保发光材料。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.