Strategies for Interfacial Modification in Perovskite Solar Cells

Recently, the certified efficiency of perovskite solar cells (PSCs) has reached 25. 2%, which are considered to be the most promising candidate for next-generation thin-film solar cells. However, uncontrollable film morphology and poor crystallinity of perovskite prepared by the solution process restrict the improvement of stability and large-area production of PSCs. To solve this problem, researchers have carried out the interfacial modification between perovskite layer and charge transport layer. Herein, we summarize applications of strategies for interfacial modification in perovskite solar cells from the perspective of methods, materials, and characterization. Meanwhile, the promising prospects of interfacial modification in low-cost and large-area PSCs are provided.