Ionic Field Screening in MAPbBr₃ Crystals Revealed from Remnant Sensitivity in X-ray Detection.

ABSTRACT: Research on metal halide perovskites as absorbers for X-ray detection is an attractive subject due to the optimal optoelectronic properties of these materials for high-sensitivity applications. However, the contact degradation and the long-term instability of the current limit the performance of the devices, in close causality with the dual electronic-ionic conductivity of these perovskites. Herein, millimeter-thick methylammonium-lead bromide (MAPbBr₃) single and polycrystalline samples are approached by characterizing their long-term dark current and photocurrent under X-ray incidence. It is shown how both the dark current and the sensitivity of the detectors follow similar trends at short-circuit (V = 0 V) after biasing. By performing drift-diffusion numerical simulati

SUBMITTER: Alvarez AO 

PROVIDER: S-EPMC10375880 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature