High-Voltage-Efficiency Inorganic Perovskite Solar Cells in a Wide Solution-Processing Window

Inorganic halide perovskites exhibit significant photovoltaic performance due to their structural stability and high open-circuit voltage (Voc). Herein, a general strategy of solution engineering has been implemented to enable a wide solution-processing window for high Voc (∼1.3 V) and power conversion efficiency (PCE, ∼12.5%). We introduce a nontoxic solvent of dimethyl sulfoxide (DMSO) and an assisted heating process in the fabrication of...