Self-powered flexible all-perovskite X-ray detectors with high sensitivity and fast response

• Main Authors: Jin Hyuck Heo, Jin Kyoung Park, Yang (Michael) Yang, David Sunghwan Lee, Sang Hyuk Im
• Format: Article
• Language: English
• Published: Elsevier 2021-08-01
• Series: iScience
• Subjects: Physics; Engineering; Devices
• Online Access: http://www.sciencedirect.com/science/article/pii/S2589004221008956

Summary: Perovskite materials have demonstrated superior performance in many aspects of optoelectronic applications including X-ray scintillation, photovoltaic, photodetection, and so on. In this work, we demonstrate a self-powered flexible all-perovskite X-ray detector with high sensitivity and fast response, which can be realized by integrating CsPbBr3 perovskite nanocrystals (PNCs) as the X-ray scintillator with a CH3NH3PbI3 perovskite photodetector. The PNCs scintillator exhibits ultra-fast light decay of 2.81 ns, while the perovskite photodetector gives a fast response time of ∼0.3 μs and high-specific detectivity of ∼2.4×1012 Jones. The synergistic effect of these two components ultimately leads to a self-powered flexible all-perovskite X-ray detector that delivers high sensitivity of 600–1,270 μC/mGyaircm3 under X-ray irradiation and fast radiation-to-current response time.