High-Sensitivity Flexible X-Ray Detectors Based on Drop Casting 2D/3D Perovskite Thick Film

Flexible X-ray detectors hold great promise for applications in wearable devices, smart wall systems, and safety monitoring technologies. This study presents a largearea, flexible perovskite X-ray detector fabricated using the drop-casting method to produce <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2 \mathrm{D} / 3 \mathrm{D}$</tex> perovskite thick films. Optimized low-temperature deposition and annealing processes ensure compatibility with flexible substrates. The devices demonstrate high sensitivity (<tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$232 \mu \text{CGy}^{-1}{ }_{\text {air }} \text{cm}^{-2}$</tex>) and excellent mechanical durability (120° bending angle), underscoring their suitability for cost-effective and efficient X-ray detection in diverse applications.