journal article·2020-01-02

Homo- and Heterovalent Doping-Mediated Self-Trapped Exciton Emission and Energy Transfer in Mn-Doped Cs2Na1–xAgxBiCl6 Double Perovskites

Bao Ke, Ruosheng Zeng, Zhuang Zhao, Qilin Wei, Xiaogang Xue, Kun Bai, Chunxiao Cai, Weichang Zhou, Zhiguo Xia, Bingsuo Zou

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Abstract

Double perovskites exhibit low toxicity, intrinsic thermodynamic stability, and small carrier effective mass. Herein, a novel doping route was adopted to incorporate Mn ions into Cs 2 Na 1– x Ag x BiCl 6 double perovskites for engineering the band gap and tailoring the energy transfer. The as-prepared Cs 2 Na 1– x Ag x BiCl 6 (0 < x < 1) exhibited excellent photoluminescence and a broad self-trapped exciton (STE) band from 500 to 900 nm, which exhibited an abnormal emission peak blue shift with increasing temperature. For Mn-doped Cs 2 Na 1– x Ag x BiCl 6, the two photoluminescence (PL) bands from d–d transition emission of Mn ions and STEs were always observed simultaneously in the PL window. The distinct energy-transfer channel from the Mn 2+ ion guest to the double-perovskite host resulted in the dominant Mn 2+ emission. Our results will be helpful for further understanding the nature of the photophysics of double perovskites.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · 2D Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China

School of Physical Science and Technology, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning 530004, People’s Republic of China

Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha 410081, People’s Republic of China

Teaching Practice Department, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China

State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, People’s Republic of China

Funding

Natural Science Foundation of Guangxi Province · National Natural Science Foundation of China · Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials · Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education · Innovation?Project of?GUET?Graduate Education

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