Quantification of light-enhanced ionic transport in lead iodide perovskite thin films and its solar cell applications.

ABSTRACT: Ionic transport in organometal halide perovskites is of vital importance because it dominates anomalous phenomena in perovskite solar cells, from hysteresis to switchable photovoltaic effects. However, excited state ionic transport under illumination has remained elusive, although it is essential for understanding the unusual light-induced effects (light-induced self-poling, photo-induced halide segregation and slow photoconductivity response) in organometal halide perovskites for optoelectronic applications. Here, we quantitatively demonstrate light-enhanced ionic transport in CH₃NH₃PbI₃ over a wide temperature range of 17-295 K, which reveals a reduction in ionic transport activation energy by approximately a factor of five (from 0.82 to 0.15 eV) under il

SUBMITTER: Zhao YC 

PROVIDER: S-EPMC6062189 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature