Mn<sup>2+</sup>掺杂CsCdCl<sub>3</sub>钙钛矿纳米晶的能量传递与发光特性研究

张安然; 周新全; 古冉然; 夏志国

doi:10.1007/s12613-024-2844-5

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 一校

Anran Zhang, Xinquan Zhou, Ranran Gu, and Zhiguo Xia, Efficient energy transfer from self-trapped excitons to Mn²⁺ dopants in CsCdCl₃:Mn²⁺ perovskite nanocrystals, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-024-2844-5

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Anran Zhang, Xinquan Zhou, Ranran Gu, and Zhiguo Xia, Efficient energy transfer from self-trapped excitons to Mn2+ dopants in CsCdCl3:Mn2+ perovskite nanocrystals, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-024-2844-5

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研究论文

Mn²⁺掺杂CsCdCl₃钙钛矿纳米晶的能量传递与发光特性研究

1)
华南理工大学材料科学与工程学院, 广东省光纤激光材料与应用技术重点实验室, 发光材料与器件国家重点实验室, 广东广州 510641, 中国
2)
华南理工大学物理与光电学院, 广东广州 510641, 中国

通讯作者:
夏志国 E-mail: xiazg@scut.edu.cn

文章亮点

(1) 设计合成了Mn²⁺掺杂CsCdCl₃纳米晶。

(2) 研究了Mn²⁺掺杂前后纳米晶的光致发光特性差异与成因机制。

(3) 揭示了CsCdCl₃: Mn²⁺纳米晶呈现高效橙红光发射的关键原因是STEs到Mn²⁺的高效能量传递。

中文摘要

卤化物钙钛矿纳米晶因其优异的发光性质而备受关注，其中Mn²⁺掺杂已被证明是调控纳米晶发光特性的有效手段。因此，深入理解Mn²⁺发光与纳米晶基质中自陷激子（Self-trapped exciton, STE）发射的相互作用机制受到广泛关注。本研究通过高温热注入法合成了Mn²⁺掺杂CsCdCl₃纳米晶。CsCdCl₃ 基质纳米晶呈现源自缺陷态的位于441 nm处的蓝光发射。CsCdCl₃独特的结构容易产生晶格扭曲，而Mn²⁺掺杂进一步促进了基质晶格畸变，有利于STEs的产生。浓度梯度实验揭示了STEs到Mn²⁺ d–d跃迁的能量传递是实现Mn²⁺在656 nm处高效橙红光发射的重要原因。

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Research Article

Efficient energy transfer from self-trapped excitons to Mn²⁺ dopants in CsCdCl₃:Mn²⁺ perovskite nanocrystals

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Abstract

Abstract

Mn²⁺ doping has been adopted as an efficient approach to regulating the luminescence properties of halide perovskite nanocrystals (NCs). However, it is still difficult to understand the interplay of Mn²⁺ luminescence and the matrix self-trapped exciton (STE) emission therein. In this study, Mn²⁺-doped CsCdCl₃ NCs are prepared by hot injection, in which CsCdCl₃ is selected because of its unique crystal structure suitable for STE emission. The blue emission at 441 nm of undoped CsCdCl₃ NCs originates from the defect states in the NCs. Mn²⁺ doping promotes lattice distortion of CsCdCl₃ and generates bright orange-red light emission at 656 nm. The energy transfer from the STEs of CsCdCl₃ to the excited levels of the Mn²⁺ ion is confirmed to be a significant factor in achieving efficient luminescence in CsCdCl₃:Mn²⁺ NCs. This work highlights the crucial role of energy transfer from STEs to Mn²⁺ dopants in Mn²⁺-doped halide NCs and lays the groundwork for modifying the luminescence of other metal halide perovskite NCs.
- perovskite nanocrystals;
- self-trapped excitons;
- luminescence;
- energy transfer

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Mn²⁺掺杂CsCdCl₃钙钛矿纳米晶的能量传递与发光特性研究

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Efficient energy transfer from self-trapped excitons to Mn²⁺ dopants in CsCdCl₃:Mn²⁺ perovskite nanocrystals

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Mn2+掺杂CsCdCl3钙钛矿纳米晶的能量传递与发光特性研究

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中文摘要

Efficient energy transfer from self-trapped excitons to Mn2+ dopants in CsCdCl3:Mn2+ perovskite nanocrystals

Abstract

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Mn²⁺掺杂CsCdCl₃钙钛矿纳米晶的能量传递与发光特性研究

Efficient energy transfer from self-trapped excitons to Mn²⁺ dopants in CsCdCl₃:Mn²⁺ perovskite nanocrystals