High-Temperature Stable FAPbBr<sub>3</sub> Single Crystals for Sensitive X-ray and Visible Light Detection toward Space
Mengnan Yao, Jizhong Jiang, Deyu Xin, Yao Ma, Wei Wei, Xiaojia Zheng, Liang Shen
Abstract
Organolead trihalide perovskite single crystals (SCs) offer unprecedented opportunity for X-ray and visible light detection. Nevertheless, it remains a challenge to keep simultaneous high-performance and stability at a high-temperature working mode. Herein, formamidinium lead bromide (FAPbBr3) SCs are developed to successfully address these issues. Low-temperature crystallized induced FAPbBr3 SCs possess an excellent mobility-lifetime product and an ultralow surface charge recombination velocity, thus exhibiting an X-ray dose rate as low as 0.3 μGyair s–1 as a sensitive radiation detector. Furthermore, it also contributes a specific detectivity as high as 3.5 × 1012 cm Hz1/2 W–1, keeping stable at high-temperature of 460 K as a photodetector. A prototype of an imaging system with diffuse reflection mode is constructed using detectors as receivers, enabling defined scanning images in a high temperature environment. The bifunctional FAPbBr3 SC detectors will motivate new strategies for stable detection in an extreme space environment.