CsPbI3 perovskite X-ray Detector by Anisotropic Conductive Film to Regulate Thermal Stress

Abstract Perovskite materials exhibit considerable potential for X-ray detection, owing to their combination of high sensitivity, low power consumption, and flexibility. However, a recognized challenge for such devices pertains to their mechanical stability under operational conditions. In this study, we propose a strategy of inserting an anisotropic conductive film (ACF) as a stress buffer layer, achieving robust mechanical interconnection between ITO and CsPbI 3 perovskite thick films. The perovskite detector, when operated under a bias voltage of 5 V, demonstrates a dark current below 1 nA cm −2 and a low detection limit of 53 nGy air s −1 . Notably, this X-ray response remains at its initial value even after 60 days of exposure to ambient conditions. This method provides new insights and pathways for the manufacture of high-stability perovskite thick-film photodetectors.