Durable Flexible Polymer-Encapsulated Cs₄PbI₆ Thin Film for High Sensitivity X-ray Detection

Because of the extraordinary properties including high atomic numbers and large μτ products, metal halide perovskites have been widely employed and used for radiation detecting. Cs₄PbI₆ material has a high X-ray attenuation coefficient and excellent electrical properties that have a good potential in X-ray detection applications. Here, we have designed a flexible polymer-encapsulated Au/Cs₄PbI₆/Au X-ray detector with outstanding sensitivity of 256.20 μC Gy^–1 cm^–2 irradiated by 30 keV X-ray at 10 V bias, long-time stability, and durable flexibility without obvious degradation after bending for 600 cycles. These features demonstrate that this polymer-encapsulated durable flexible and sensitive X-ray detector could open a new possibility for next-generation radiation applications in dosimeter, imaging technologies.