Flexible perovskite x-ray detection for wearable applications in human radiation protection

Organic–inorganic halide perovskites are promising for next-generation X-ray detectors owing to their excellent optoelectronic properties and strong x-ray attenuation. Hydraulic pressing has recently emerged as a solvent-free, fast, and convenient method to fabricate thick perovskite pellets directly from powder. However, such pellets often suffer from internal strain and defects, which lead to ion migration and mechanical fragility. Here, we report an in situ encapsulation strategy using α-lipoic acid (α-LA) that forms a flexible scaffold around the perovskite grains. The resulting composite demonstrates a high sensitivity of 1008μC/Gy·cm² at a low electric field of 0.04 V/μm, while suppressing ion migration, passivating defects, relieving crystal strain, and imparting flexibility. With improved mechanical resilience, this material offers a robust platform for wearable and high-resolution x-ray detection applications.