Perovskite solar cells (PSCs) require both high efficiency and good long-term stability if they
are to be commercialized. It is crucial to finely optimize the energy level matching between …

Today's best perovskite solar cells use a mixture of formamidinium and methylammonium as
the monovalent cations. With the addition of inorganic cesium, the resulting triple cation …

BACKGROUND Perovskite solar cells (PSCs) have attracted intensive attention because of
their ever-increasing power conversion efficiency (PCE), low-cost materials constituents …