Exploring Lead-free Hybrid Double Perovskite Crystals of (BA)2CsAgBiBr7 with Large Mobility-Lifetime Product toward X-ray Detection.

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ID: 19597
2019
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Abstract
Halide double perovskites have recently bloomed as the green candidates for optoelectronic applications, such as X-ray detection. Despite great efforts, the exploration of promising organic-inorganic hybrid double perovskites toward X-ray detection remains a blank. Here, for the first time, we present single crystals of the lead-free hybrid double perovskite, (BA) 2 CsAgBiBr 7 (BA + is n-butylammonium), featuring the unique 2D multilayered quantum-confined motif, which enable quite large μτ (mobility-lifetime) product up to ~1.21 × 10 -3 cm 2 V -1 . This figure-of-merit realized in 2D hybrid double perovskites is unprecedented and comparable with that of CH 3 NH 3 PbI 3 wafers. Further, (BA) 2 CsAgBiBr 7 crystals also exhibit other intriguing attributes for X-ray detection, including high bulk resistivity, low density of defects and traps, and large X-ray attenuation coefficient. Consequently, vertical-structure crystal device under X-ray source yields a superior sensitivity of 4.2 μC Gy air -1 cm -2 . This work suggests great potentials of 2D hybrid double perovskites as candidate toward X-ray detection, and knocks the door for their future optoelectronic device applications.
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sun2019exploringangewandte Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sun, Zhihua;Xu, Zhiyun;Liu, Xin;Li, Yaobin;Liu, Xitao;Yang, Tao;Ji, Chengmin;Han, Shiguo;Xu, Yadong;Luo, Junhua;
Journal angewandte chemie (international ed in english)
Year 2019
DOI
10.1002/anie.201909815
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