“One‐Click Restart” Recycling of Metal‐Free Perovskite X‐Ray Detectors

Abstract Halide perovskites have shown great potential in X‐ray detection due to outstanding optoelectronic properties. However, finding a cost‐effective and environmentally sustainable method for handling end‐of‐life devices has remained challenging. Here, a “One‐Click Restart” eco‐friendly recycling strategy is introduced for end‐of‐life perovskite X‐ray detectors. This method, utilizing water, allows for the recapture and reuse of both perovskite and conductor materials. The process is straightforward and environmentally friendly, eliminating the need for further chemical treatment, purification, additional additives or catalysts, and complex equipment. A sustainable device cycle is developed by reconstructing flexible perovskite membranes for wearable electronics from recycled materials. Large‐scale, flexible membranes made from metal‐free perovskite DABCO‐N 2 H 5 ‐I 3 (DABCO = N ‐ N ′‐diazabicyclo[2.2.2]octonium) achieve remarkably impressive average sensitivity of 6204 ± 268 µC Gy air −1 cm −2 and a low detection limit of 102.3 nGy air s −1 , which makes highly effective for X‐ray imaging. The sensitivity of recycled flexible devices not only matches that of single‐crystal devices made with fresh materials but also ranks as the highest among all metal‐free perovskite X‐ray detectors. “One‐Click Restart” applies to scalable flexible devices derived from aged single‐crystal counterparts, offering significant cost, time, and energy savings compared to their single‐crystal equivalents. Such advantages significantly boost future market competitiveness.