Orthorhombic Non‐Perovskite CsPbI3 Microwires for Stable High‐Resolution X‐Ray Detectors

• DOI: 10.1002/adom.202200516
• Publication Date: 2022-05-02T02:36:08Z
• Authors: Soumya Kundu; Devon Richtsmeier; Alexander Hart; Vishal Yeddu; Zihao Song; Guangda Niu; Deepak Thrithamar...; Emma Dennis; Jiang Tang; Oleksandr Voznyy; Magdalena Bazalov...; Makhsud I. Saidam...
• Keywords: X-ray detector; Orthorhombic crystal system

Abstract X‐ray detectors are used widely, but they suffer from short operational stability and insufficient absorptivity of photons. Here, a strategy for room‐temperature, solution‐grown δ‐CsPbI 3 monocrystalline microwires exhibiting one the highest linear absorption coefficients among known semiconductors is reported. In metal–semiconductor–metal architecture, demonstrates lowest detectable dose rates at 33.3 nGy air s −1 , enabled by its exceptionally low dark current density 12 pA mm −2 . The detector remains stable following continuous operation total accumulated 1.44 × 10 6 Gy which equivalent to 720 million chest scans. 1D crystalline nature enables high imaging resolution 12.4 line pairs per millimeter (lp ).