Hysteresis and Its Correlation to Ionic Defects in Perovskite Solar Cells.

ABSTRACT: Ion migration has been reported to be one of the main reasons for hysteresis in the current-voltage (J-V) characteristics of perovskite solar cells. We investigate the interplay between ionic conduction and hysteresis types by studying Cs_0.05(FA_0.83MA_0.17)_0.95Pb(I_0.9Br_0.1)₃ triple-cation perovskite solar cells through a combination of impedance spectroscopy (IS) and sweep-rate-dependent J-V curves. By comparing polycrystalline devices to single-crystal MAPbI₃ devices, we separate two defects, β and γ, both originating from long-range ionic conduction in the bulk. Defect β is associated with a dielectric relaxation, while the migration of γ is influenced by the perovskite/hole

SUBMITTER: Tammireddy S 

PROVIDER: S-EPMC10860142 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature