Hydrazine acetate promoted the formation of equiaxed perovskite grains for efficient solar cells

Abstract

The power conversion efficiency (PCE) of solution processed perovskite solar cells (PSCs) has significantly increased from 3.8% to over 26%. By introducing additives into the perovskite precursor solution, the chemical properties of the solution can be altered, hence improving its crystallization kinetics. In this study, we have successfully demonstrated a transformation in the perovskite morphology from dendrites to equiaxed crystals by incorporating inexpensive hydrazine acetate into the perovskite precursor solution. Consequently, this enhancement results in a substantial increase in the PCE of the device from 0.09% to an impressive 10.58%.