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

• Published in: iScience 2021-08, Vol.24 (8), p.102927-102927, Article 102927
• Main Authors: Heo, Jin Hyuck, Park, Jin Kyoung, Yang, Yang (Michael), Lee, David Sunghwan, Im, Sang Hyuk
• Format: Article
• Language: English
• Subjects: Devices; Engineering; Physics
• ISSN: 2589-0042; 2589-0042
• DOI: 10.1016/j.isci.2021.102927

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. [Display omitted] •Self-powered flexible all-perovskite indirect X-ray detectors are fabricated•CsPbBr3 PNCs-PDMS composite X-ray scintillator shows excellent super flexibility•The MAPbI3 photodetector has good response to both visible and X-ray irradiation•The X-ray detector shows high sensitivity, fast response, and good bending stability Physics; Engineering; Devices