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

Anran Zhang; Xinquan Zhou; Ranran Gu; Zhiguo Xia

doi:10.1007/s12613-024-2844-5

Volume 31 Issue 6

Jun. 2024

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2024 > 31(6): 1456-1461

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., 31(2024), No. 6, pp. 1456-1461. 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., 31(2024), No. 6, pp. 1456-1461. https://doi.org/10.1007/s12613-024-2844-5

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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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Corresponding author:
Zhiguo Xia E-mail: xiazg@scut.edu.cn
Received: 21 November 2023; Revised: 21 January 2024; Accepted: 29 January 2024; Available online: 30 January 2024

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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