APbI 3 -A 2 AgBiI 6 Double-Layer Perovskite Film for a Self-Powered and High-Stability X-ray Detector

作者：Xingyu Zhu, Yizhen Liu, Siyuan Huang, Xiuying Gao, Jie Li, Hui Sun, Peihua Wangyang, Xiaobin Niu · 发表于：ACS Applied Materials & Interfaces · 年份：2024 · DOI：10.1021/acsami.4c00095 · 被引用次数：10 · 研究领域：Perovskite Materials and Applications、Solid-state spectroscopy and crystallography、Optical properties and cooling technologies in crystalline materials

The development of lead halide perovskite X-ray detectors has promising applications in medical imaging and security inspection but is hindered by poor long-term stability and drift of the dark current and photocurrent. Herein, we design a (Cs 0.05 MA 0.65 FA 0.3 )PbI 3 -(Cs 0.1 MA 1.3 FA 0.6 )AgBiI 6 double-layer perovskite film to assemble a self-powered flat-panel X-ray detector. The demonstrated X-ray detector achieves an outstanding self-powered sensitivity of 80 μC Gy air –1 cm –2 under a 0 V bias. More importantly, owing to the inhibition of the phase transition process and ion migration of (Cs 0.05 MA 0.65 FA 0.3 )PbI 3 by the (Cs 0.1 MA 1.3 FA 0.6 )AgBiI 6 layer, the device exhibits excellent continuous operating stability with a retention rate of 99% dark current and photocurrent over X-ray pulses of up to 4000 s and excellent long-term stability without a loss of the original response current after 150 days in an air environment. The strategy of double-layer perovskites improves the stability and sensitivity of devices, which paves a path for the industrial application of lead halide perovskite X-ray detectors.