Perovskite solar cells with atomically coherent interlayers on SnO₂ electrodes

A research team, led by Professor Sang Il Seok in the School of Energy and Chemical Engineering at UNIST has set a new efficiency record for a perovskite solar cell (PSC) at 25.8% by forming an interlayer between electron-transporting and perovskite layers to minimize interfacial defects, contributing to the decrease in the power conversion efficiencies. The new record, according to the research team, is the world's highest power conversion efficiency (PCE) reported so far. Besides, the record, certified by National Renewable Energy Laboratory (NREL), is also the highest confirmed conversion efficiency of 25.5%.