▎ 摘　　要

NOVELTY - A perovskite solar battery comprises transparent substrate, conductive anode, hole transport layer, two-dimensional perovskite protective layer (I), three-dimensional perovskite active layer, two-dimensional perovskite protective layer (II), electron transport layer, hole blocking layer and metal cathode arranged from bottom to top. USE - Perovskite solar battery. ADVANTAGE - The perovskite solar battery has improved stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of perovskite solar battery.