Ming-Qian Chen

Learning from oxide perovskites for defect engineering in halide perovskite photovoltaics

The exceptional functional diversity of perovskites arises from a flexible octahedral architecture that tolerates chemical substitution, lattice distortion, nonstoichiometry, and structural imperfections. In oxide perovskites, this flexibility has been used to engineer oxygen vacancies, cation valence states, and exten...