Virtual Frisch grid perovskite CsPbBr₃ semiconductor with 2.2-centimeter thickness for high energy resolution gamma-ray spectrometer.

ABSTRACT: High intrinsic detection efficiency is as decisive as high energy resolution. Scaling up detector volume has presented great challenges, preventing perovskite semiconductors from reaching sufficient detection efficiency. We report a hole-only virtual-Frisch-grid CsPbBr₃ detector up to 2.2 cm thick for efficient gamma-ray spectroscopy. By utilizing high-quality columnar CsPbBr₃ single crystals up to ~1 cm³, we configure virtual-Frisch-grid detectors with optimized weighting potential distribution. These centimeter-thick detectors outperform ambipolar planar configuration, achieving a champion energy resolution of 1.9% at 662 keV. Time-of-flight analysis, stimulated by single gamma-ray photon, reveals hole carrier multiplication effect possibly caused by Auge

SUBMITTER: Qin H 

PROVIDER: S-EPMC11697039 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature