Abstract
Lead halide perovskites, with high photoluminescence efficiency and narrow-band emission, are promising materials for display and lighting. However, the lead toxicity and environmental sensitivity hinder their potential applications. Herein, a new antimony-doped lead-free inorganic perovskites variant Cs2SnCl6:xSb is designed and synthesized. The perovskite variant Cs2SnCl6:xSb exhibits a broadband orange-red emission, with a photoluminescence quantum yield (PLQY) of 37%. The photoluminescence of Cs2SnCl6:xSb is caused by the ionoluminescence of Sb3+ within Cs2SnCl6 matrix, which is verified by temperature dependent photoluminescence (PL) and PL decay measurements. In addition, the all inorganic structure renders Cs2SnCl6:xSb with excellent thermal and water stability. Finally, a white light-emitting diode (white-LED) is fabricated by assembling Cs2SnCl6:0.59%Sb, Cs2SnCl6:2.75%Bi and Ba2Sr2SiO4: Eu2+ onto the commercial UV LED chips, and the color rendering index (CRI) reaches 81.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51761145048, 61725401 and 51702107), the National Key R&D Program of China (No. 2016YFB0700702) and the China Postdoctoral Science Foundation (No. 2018M632843). The authors thank the Analytical and Testing Center of HUST and the facility support of the Center for Nanoscale Characterization and Devices, WNLO. The work at Tokyo Institute of Technology was conducted under the Tokodai Institute for Element Strategy (TIES) funded by the MEXT Elements Strategy Initiative to Form Core Research Center.
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**ghui Li received his B.S. degree from School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST) China in 2017. He is currently a Ph.D. candidate in Prof. Jiang Tang’s group in Wuhan National Laboratory for Optoelectronics (WNLO) at HUST. His current researches focus on luminescent perovskite materials and its application.
Zhifang Tan received his Master’s degree from Huazhong Normal University at 2010, and his Ph.D. degree in Applied Chemistry from Hiroshima University at 2014. Now he works toward Postdoctor in WNLO. His research interest includes the research and exploration of photoelectric materials, lead or lead-free perovskite materials.
Manchen Hu is a third-year undergraduate in School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST). He joined Prof. Tang’s research group in 2017. His research mainly focuses on novel materials and their applications in optoelectronic devices.
Guangda Niu is an associate professor at Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China. He is working on synthesis of metal halide perovskite semiconductors and their applications in optoelectronic devices.
Jiang Tang received his Bachelor’s degree from University of Science and Technology at 2003, and his Ph.D. degree in Material Science and Engineering from University of Toronto at 2010. He spent one year and half as a postdoctoral researcher at IBM T. J. Watson research center and then joined in Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology as a professor in 2012. His group focuses on antimony selenide (Sb2Se3) thin film solar cells, halide perovskites nanocrystals for light emitting and single crystals for X-ray detection. He has published 70 + papers including Nature, Nat. Mater., Nat. Energy and Nat. Photonics with 3500 citations. He is the receiver of the “1000 Young Talents” and the National Natural Science Funds for Distinguished Young Scholar.
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Li, J., Tan, Z., Hu, M. et al. Antimony doped Cs2SnCl6 with bright and stable emission. Front. Optoelectron. 12, 352–364 (2019). https://doi.org/10.1007/s12200-019-0907-4
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DOI: https://doi.org/10.1007/s12200-019-0907-4