High-Temperature Stable FAPbBr3 Single Crystals for Sensitive X-ray and Visible Light Detection toward Space

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 (FAPbBr(3)) SCs are developed to successfully address these issues. Low-temperature crystallized induced FAPbBr(3) 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 mu Gy(air) s(-1) as a sensitive radiation detector. Furthermore, it also contributes a specific detectivity as high as 3.5 x 10(12) cm Hz(1/2) 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 FAPbBr(3) SC detectors will motivate new strategies for stable detection in an extreme space environment.

Automated summary

Organolead trihalide perovskite single crystals offer unprecedented opportunity for X-ray and visible light detection, and formamidinium lead bromide single crystals are developed to address the challenge of maintaining high-performance and stability at high temperatures. These crystals demonstrate excellent performance as radiation detectors with low X-ray dose rate and high detectivity, as well as stability as photodetectors at high temperatures. The development of these bifunctional detectors could pave the way for stable detection in extreme space environments.