Fig. 1From: Stable High-Efficiency Two-Dimensional Perovskite Solar Cells Via Bromine IncorporationSEM images of BA2MA4Pb5I16-10xBr10x films based on a 0% PbBr2, b 5% PbBr2, c 10% PbBr2, and d 15% PbBr2Back to article page