Ultrawide‐Bandgap Rb 2 AgI 3 Single‐Crystals: Dual‐Functional Platform for Polarization‐Sensitive UVB Photodetection and High‐Sensitivity X‐Ray Imaging
Yalin Zhai·Mingming Jiang·Chengyu Luan·Songling Feng·Haijiao Xie·Peng Wan·Caixia Kan·Daning Shi·X Zhao
ABSTRACT Lead‐free ultrawide‐bandgap semiconductors are crucial for next‐generation optoelectronics, yet achieving materials that concurrently enable polarization‐resolved ultraviolet detection and high‐energy radiation sensing remains a grand challenge. Here, we report the synthesis of high‐quality Rb 2 AgI 3 perovskite single‐crystals via a customized chemical vapor deposition method. This material uniquely integrates an ultrawide bandgap (≈4.03 eV), high‐Z constituents for efficient X‐ray att