Nucleation-controlled growth of superior lead-free perovskite Cs3Bi2I9 single-crystals for high-performance X-ray detection

Yunxia Zhang, Yucheng Liu, Zhuo Xu, Haochen Ye, Zhou Yang, Jiaxue You, Ming Liu, Yihui He, Mercouri G. Kanatzidis and Shengzhong (Frank) Liu ()
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Yunxia Zhang: Shaanxi Normal University
Yucheng Liu: Shaanxi Normal University
Zhuo Xu: Shaanxi Normal University
Haochen Ye: Shaanxi Normal University
Zhou Yang: Shaanxi Normal University
Jiaxue You: Shaanxi Normal University
Ming Liu: Xi’an Jiaotong University
Yihui He: Northwestern University
Mercouri G. Kanatzidis: Northwestern University
Shengzhong (Frank) Liu: Shaanxi Normal University

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract The organic-inorganic hybrid lead halide perovskites have emerged as a series of star materials for solar cells, lasers and detectors. However, the issues raised by the toxic lead element and marginal stability due to the volatile organic components have severely limited their potential applications. In this work, we develop a nucleation-controlled solution method to grow large size high-quality Cs3Bi2I9 perovskite single crystals (PSCs). Using the technique, we harvest some centimeter-sized single crystals and achieved high device performance. We find that X-ray detectors based on PSCs exhibit high sensitivity of 1652.3 μC Gyair−1 cm−2 and very low detectable dose rate of 130 nGyair s−1, both desired in medical diagnostics. In addition, its outstanding thermal stability inspires us to develop a high temperature X-ray detector with stable response at up to 100 °C. Furthermore, PSCs exhibit high X-ray imaging capability thanks to its negligible signal drifting and extremely high stability.

Date: 2020
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DOI: 10.1038/s41467-020-16034-w

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