Fig. 1. (Color online) (a) The sintered MAPbI₃ wafer. (b) The X-ray detector with MAPbI₃ wafer. (c) Extracted charge at E = 0.2 V∙μm⁻¹ for MAPbI₃-wafer-based device and CdTe reference detector. All exposures are 2-s-long pulses from an X-ray source operated at 70 kV. Reproduced with permission^[13], Copyright 2017, Nature Publishing Group. (d) Densification of perovskites in graphite die. (e) UV-vis absorption and steady-state PL spectra for FAST-MAPbI₃ and MAPbI₃ powder. (f) I−V curve for the holy-only device under dark. Reproduced with permission^[16], Copyright 2016, Nature Publishing Group.

Fig. 2. (Color online) (a) Ion migration. (b) Suppressed ion migration by BiOBr passivation. (c) X-ray sensitivity under different electric fields. Reproduced with permission^[14], Copyright 2019, Nature Publishing Group. (d) Photoresponse spectrum for the photodetector at 5 V. (e) Response time of the photodetector at 5 V. (f) Photocurrent of the photodetector as a function of time measured during periodical switching of 800 nm light illumination at 5 V. Reproduced with permission^[20], Copyright 2023, Royal Society of Chemistry.