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Jeong, Hu Young
UCRF Electron Microscopy group
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Highly ordered lead-free double perovskite halides by design

Author(s)
Ahn, Chang WonJo, Jae HunKim, Jong ChanUllah, HamidRyu, SangkyunHwang, YounghunChoi, Jin SanLee, JongminLee, SanghanJeen, HyoungjeenShin, Young-HanJeong, Hu YoungKim, Ill WonKim, Tae Heon
Issued Date
2020-12
DOI
10.1016/j.jmat.2020.05.008
URI
https://scholarworks.unist.ac.kr/handle/201301/48258
Fulltext
https://www.sciencedirect.com/science/article/pii/S2352847820301064
Citation
JOURNAL OF MATERIOMICS, v.6, no.4, pp.651 - 660
Abstract
Lead-free double perovskite halides are emerging optoelectronic materials that are alternatives to lead-based perovskite halides. Recently, single-crystalline double perovskite halides were synthesized, and their intriguing functional properties were demonstrated. Despite such pioneering works, lead-free double perovskite halides with better crystallinity are still in demand for applications to novel optoelectronic devices. Here, we realized highly crystalline Cs2AgBiBr6 single crystals with a well-defined atomic ordering on the microscopic scale. We avoided the formation of Ag vacancies and the subsequent secondary Cs3Bi2Br9 by manipulating the initial chemical environments in hydrothermal synthesis. The suppression of Ag vacancies allows us to reduce the trap density in the as-grown crystals and to enhance the carrier mobility further. Our design strategy is applicable for fabricating other lead-free halide materials with high crystallinity. (C) 2020 The Chinese Ceramic Society. Production and hosting by Elsevier B.V.
Publisher
ELSEVIER
ISSN
2352-8478
Keyword (Author)
Cs2AgBiBr6Lead-freeDouble perovskiteSingle crystal
Keyword
X-RAY-DETECTORSSEMICONDUCTOR CSPBBR3SOLAR-CELLSTHIN-FILMSBREFFICIENTCLNANOCRYSTALSCSPBX3GROWTH

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