DataVXAdvanced Optical MaterialsPaper
journal article·2019-05Open access

Lead‐Free Perovskite Derivative Cs2SnCl6−xBrx Single Crystals for Narrowband Photodetectors

Jun Zhou, Jiajun Luo, Ximing Rong, Peijia Wei, Maxim S. Molokeev, Yang Huang, Jing Zhao, Quanlin Liu, Xiuwen Zhang, Jiang Tang, Zhiguo Xia

Advanced Optical Materials· Volume 7· Issue 10
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Source abstract

Abstract

Abstract Lead‐free and stable Sn halide perovskites demonstrate tremendous potential in the field of optoelectronic devices. Here, the structure and optical properties of the “defect” perovskites Cs2SnCl6−xBrx are reported, as well as their use as photodetector materials. Millimeter‐sized Cs2SnCl6−xBrx single crystals are grown by the hydrothermal method, with the body color continuously changing from transparent to yellow and finally to dark red. Narrowband single‐crystal photodetectors using Cs2SnCl6−xBrx crystals are presented, which show a high detectivity of ≈2.71 × 1010 Jones, with narrowband photodetection (full‐width at half‐maximum ≈45 nm) and high ion diffusion barriers. Moreover, the response spectra are continuously tuned from near violet to orange depending on the variation of the bandgap of the single crystals by changing the halide compositions. The strong surface charge recombination of the excess carriers near the crystal surfaces produced by short wavelength light elucidates the narrowband photodetection behavior. This work provides a new paradigm in the design of lead‐free, stable, and high‐performance perovskite derivatives for optoelectronics applications.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Solid-state spectroscopy and crystallography · Thermal Expansion and Ionic Conductivity

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

Affiliations

The Beijing Municipal Key Laboratory of New Energy Materials and Technologies School of Materials Sciences and Engineering University of Science and Technology Beijing Beijing 100083 P. R. China

Sargent Joint Research Center Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 P. R. China

Shenzhen Key Laboratory of Flexible Memory Materials and Devices College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 P. R. China

Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University Shenzhen 518060 P. R. China

Laboratory of Crystal Physics Kirensky Institute of Physics Federal Research Center KSC SB RAS Krasnoyarsk 660036 Russia

Department of Engineering Physics and Radioelectronics Siberian Federal University Krasnoyarsk 660041 Russia

Department of Physics Far Eastern State Transport University Khabarovsk 680021 Russia

State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials South China University of Technology Guangzhou 510641 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality

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