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

Jin Hyuck Heo; Jin Kyoung Park; Yang Michael Yang; David Sunghwan Lee; Sang Hyuk Im

doi:10.1016/j.isci.2021.102927

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

iScience. 2021 Jul 30;24(8):102927. doi: 10.1016/j.isci.2021.102927. eCollection 2021 Aug 20.

Authors

Jin Hyuck Heo¹, Jin Kyoung Park¹, Yang Michael Yang², David Sunghwan Lee¹, Sang Hyuk Im¹

Affiliations

¹ Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea.
² State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University, Hangzhou, Zhejiang, China.

Abstract

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/mGy_aircm³ under X-ray irradiation and fast radiation-to-current response time.

Keywords: Devices; Engineering; Physics.