Highly stable and efficient all-inorganic lead-free perovskite solar cells with native-oxide passivation

Abstract

Replacing the toxic lead in the state-of-the-art halide perovskite solar cells is highly desired but the device performance and stability are usually compromised. Here Chen et al. develop inorganic cesium tin and germanium mixed-cation perovskites that show high operational stability and efficiency over 7%.