Cryogenic Temperatures Characterization of an MAPbBr₃ Perovskite and a Silicon Photomultiplier for Radiation Detector Applications

Methylammonium lead bromide (MAPbBr₃) perovskites are strong candidates for application as radiation detectors with both semiconducting and scintillating properties. The crystalline phase transition of MAPbBr₃ at cryogenic temperatures changes its electrical and optical properties. Herein, the optical and electrical properties of MAPbBr₃ are studied as a function of the decreasing temperature for cryogenic radiation detector applications. The optical properties are investigated by measuring the photoluminescence spectra excited using 310 and 410 nm light-emitting device, while the electrical properties are assessed by measuring the dark current and photocurrent. Furthermore, the premature breakdown voltage and gain of a silicon photomultiplier coupled with MAPbBr₃ as a photosensor are measured in relation to the temperature.