Durable all inorganic perovskite tandem photovoltaics

All-inorganic perovskites prepared by substituting the organic cations (e.g. methylammonium (MA+) and formamidinium (FA+)) with inorganic cations (e.g. Cs+) are effective concepts to enhance the long-term photo- and thermal-stability of perovskite solar cells (PSCs)1,2. Hence, inorganic perovskite t...