Surface versus Bulk Currents and Ionic Space-Charge Effects in CsPbBr₃ Single Crystals.

ABSTRACT: CsPbBr₃ single crystals have potential for application in ionizing-radiation detection devices due to their optimal optoelectronic properties. Yet, their mixed ionic-electronic conductivity produces instability and hysteretic artifacts hindering the long-term device operation. Herein, we report an electrical characterization of CsPbBr₃ single crystals operating up to the time scale of hours. Our fast time-of-flight measurements reveal bulk mobilities of 13-26 cm² V^-1 s^-1 with a negative voltage bias dependency. By means of a guard ring (GR) configuration, we separate bulk and surface mobilities showing significant qualitative and quantitative transport differences. Our experiments of current transients and impedance spectroscopy indica

SUBMITTER: Almora O 

PROVIDER: S-EPMC9082610 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature