Lei Yunlin, Wang Shouyu, Xing Jie, Xu Hong, Han Jing, Liu Weifang
College of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, China.
School of Sciences, China University of Geosciences, Beijing 100083, China.
Inorg Chem. 2020 Apr 6;59(7):4349-4356. doi: 10.1021/acs.inorgchem.9b03277. Epub 2020 Mar 25.
Low-dimensional lead-free organic-inorganic hybrid perovskites have gained increasing attention as having low toxicity, ease of processing, and good optoelectronic properties. Seeking for lead-free and narrow band gap organic-inorganic hybrid perovskites are of great importance for the development and application of photoelectric materials. Here, we reported a Sb-based organic-inorganic hybrid perovskite (MV)[SbICl], which has one-dimensional inorganic frameworks of the I-sharing double octahedra. (MV)[SbICl] shows a narrow direct band gap of 1.5 eV, and displays obvious photoresponse for the 532 nm light with rapid response speed of = 0.69 s, = 0.28 s. With an illumination power of 5 mW and a 50 V bias, the responsivities () and external quantum efficiency (EQE) for (MV)[SbICl] photodetector under 532 nm laser are 29.75 mA/W and 6.69% respectively. This Sb-based halide double perovskite material will provide an alternative material for photodetector devices.
低维无铅有机-无机杂化钙钛矿因其低毒性、易于加工和良好的光电性能而受到越来越多的关注。寻找无铅且窄带隙的有机-无机杂化钙钛矿对于光电材料的开发和应用具有重要意义。在此，我们报道了一种基于锑的有机-无机杂化钙钛矿（MV）[SbICl]，其具有碘共享双八面体的一维无机骨架。（MV）[SbICl]显示出1.5 eV的窄直接带隙，并且对532 nm光表现出明显的光响应，响应速度快，上升时间τr = 0.69 s，下降时间τf = 0.28 s。在5 mW的光照功率和50 V的偏压下，（MV）[SbICl]光电探测器在532 nm激光下的响应度（R）和外量子效率（EQE）分别为29.75 mA/W和6.69%。这种基于锑的卤化物双钙钛矿材料将为光电探测器器件提供一种替代材料。
