Competing Energy Transfer-Modulated Dual Emission in Mn2+-Doped Cs2NaTbCl6 Rare-Earth Double Perovskites

Yuanjie Chen; Ruosheng Zeng; Qilin Wei; Shuai Zhang; Binbin Luo; Canxu Chen; Xiaoshan Zhu; Sheng Cao; Bingsuo Zou; Jin Zhong Zhang

doi:10.1021/acs.jpclett.2c02491

Competing Energy Transfer-Modulated Dual Emission in Mn²⁺-Doped Cs₂NaTbCl₆ Rare-Earth Double Perovskites

J Phys Chem Lett. 2022 Sep 15;13(36):8529-8536. doi: 10.1021/acs.jpclett.2c02491. Epub 2022 Sep 6.

Authors

Affiliations

¹ School of Physical Science and Technology, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, China.
² Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong 515063, China.
³ Department of Electrical and Biomedical Engineering, University of Nevada Reno, Reno, Nevada 89557, United States.
⁴ Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States.

PMID: 36067065
DOI: 10.1021/acs.jpclett.2c02491

Abstract

A₂B^IB^IIIX₆ double perovskites are promising materials due to their outstanding photoelectronic properties and excellent stability in the environment. Herein, we synthesized Mn²⁺:Cs₂NaTbCl₆ with dual emission through a solvothermal method for the first time. Mn²⁺:Cs₂NaTbCl₆ double perovskites exhibit excellent environmental stability and high photoluminescence quantum yields (PLQYs). The Cs₂NaTbCl₆ was successfully doped with Mn²⁺ in two modes: at Mn-feeding concentrations below 1%, Mn²⁺ first tend to insert into the interstitial void, but if the Mn-feeding concentration exceeds 1%, Mn²⁺ will further substitute Na⁺ site of the Cs₂NaTbCl₆ lattice and thus both two doping modes coexist. After Mn²⁺ doping, efficient energy transfer from the ⁵D₄ level of Tb³⁺ ions to the ⁴T₁ level of Mn²⁺ ions occurs, resulting in tunable dual emission from the Tb³⁺⁵D₄ → ⁷F_J=6,5,4,3 transition and Mn²⁺⁴T₁ → ⁶A₁ transition. Further, LED based on the Mn²⁺:Cs₂NaTbCl₆ double perovskites exhibits excellent performance and stability. This work demonstrates a strategy to achieve novel lanthanide-based double perovskites with potential applications in photonics.