Cesium containing triple cation perovskite solar cells: improved stability, reproducibility and high efficiency+ +Electronic supplementary information (ESI) available. See DOI: 10.1039/c5ee03874j Click here for additional data file.
Today's best perovskite solar cells use a mixture of formamidinium and methylammonium as the monovalent cations. Adding cesium improves the compositions greatly.
Energy environmental science