Effect of Light-Induced Halide Segregation on the Performance of Mixed-Halide Perovskite Solar Cells.

ABSTRACT: Light-induced halide segregation hampers obtaining stable wide-band-gap solar cells based on mixed iodide-bromide perovskites. So far, the effect of prolonged illumination on the performance of mixed-halide perovskite solar cells has not been studied in detail. It is often assumed that halide segregation leads to a loss of open-circuit voltage. By simultaneously recording changes in photoluminescence and solar cell performance under prolonged illumination, we demonstrate that cells instead deteriorate by a loss of short-circuit current density and that the open-circuit voltage is less affected. The concurrent red shift, increased lifetime, and higher quantum yield of photoluminescence point to the formation of relatively emissive iodide-rich domains under illumination. Kinetic Monte Carlo

SUBMITTER: Datta K 

PROVIDER: S-EPMC8317152 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature