Stable and highly sensitive self-powered X-ray detection via high-density CsPbBr-type Dion–Jacobson trilayer hybrid perovskites

. Excitingly, 1 also exhibits favourable environmental stability: after three months of ambient air exposure, the device retains 84.3% of its initial detection efficiency. This study provides valuable insights for advancing the development of high-performance X-ray detection devices with enhanced operational stability.