Low defects, large area and high stability of all-inorganic lead halide perovskite CsPbBr3 thin films with micron-grains via heat-spraying process for self-driven photodetector

• DOI: 10.1039/c8ra04558e
• Publication Date: 2018-08-15T08:24:04Z
• Authors: Huawei Zhou; Lin Fan; Guohang He; Cang Yuan; Yunying Wang; Shaozhen Shi; Ning Sui; Baoli Chen; Yingtian Zhang; Qingxia Yao; Jinsheng Zhao; Xianxi Zhang; Jie Yin
• Keywords: Absorption edge

All-inorganic lead halide perovskite CsPbBr3 has important applications in photoelectronic devices such as photodetectors, LEDs and photovoltaic devices. However, preparing high-quality thin films proven to be challenging. In this study, we prepared all-inorganic with micron-grains (MG-CsPbBr3-TF) via a heat-spraying process (HSP) using CsPbBr3-saturated solution (CsPbBr3-SS), the exhibited large area, low defects high stability. The grain size of MG-CsPbBr3-TF was about 1-5 microns. micron-sized grains enabled absorption cutoff edge extended from 537 545 nm. addition, presence fewer boundaries reduced (the blue shift luminescence). response wavelengths low-cost self-driven (zero-biased) photodetector based on were 330 600 having area (10 cm × 10 cm) also by HSP excellent stability (1944 h) air (T = 298 K, 40% humidity). To best our knowledge, is first study HSP. results are great interest for both fundamental research practical