High-Performance UV–Vis Photodetectors Based on a Lead-Free Hybrid Perovskite Crystal (MV)[SbI₃Cl₂]

Abstract

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)[SbI₃Cl₂], which has one-dimensional inorganic frameworks of the I-sharing double octahedra. (MV)[SbI₃Cl₂] shows a narrow direct band gap of 1.5 eV, and displays obvious photoresponse for the 532 nm light with rapid response speed of <i>t</i>_rise = 0.69 s, <i>t</i>_decay = 0.28 s. With an illumination power of 5 mW and a 50 V bias, the responsivities (<i>R</i>) and external quantum efficiency (EQE) for (MV)[SbI₃Cl₂] 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.