Potassium iodide reduces the stability of triple-cation perovskite solar cells.

ABSTRACT: The addition of alkali metal halides to hybrid perovskite materials can significantly impact their crystallisation and hence their performance when used in solar cell devices. Previous work on the use of potassium iodide (KI) in active layers to passivate defects in triple-cation mixed-halide perovskites has been shown to enhance their luminescence efficiency and reduce current-voltage hysteresis. However, the operational stability of KI passivated perovskite solar cells under ambient conditions remains largely unexplored. By investigating perovskite solar cell performance with SnO₂ or TiO₂ electron transport layers (ETL), we propose that defect passivation using KI is highly sensitive to the composition of the perovskite-ETL interface. We reconfirm findings from prev

SUBMITTER: Alanazi TI 

PROVIDER: S-EPMC9057489 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature