Constructing heterojunctions by surface sulfidation for efficient inverted perovskite solar cells

• Published in: Science (American Association for the Advancement of Science) Vol. 375; no. 6579; pp. 434 - 437
• Main Authors: Li, Xiaodong, Zhang, Wenxiao, Guo, Xuemin, Lu, Chunyan, Wei, Jiyao, Fang, Junfeng
• Format: Journal Article
• Language: English
• Published: United States The American Association for the Advancement of Science 28.01.2022
• Subjects: Aging; Bonding strength; Electric fields; Energy conversion efficiency; Heterojunctions; Perovskites; Photovoltaic cells; Solar cells; Sulfidation; Sulfur

A stable perovskite heterojunction was constructed for inverted solar cells through surface sulfidation of lead (Pb)–rich perovskite films. The formed lead-sulfur (Pb-S) bonds upshifted the Fermi level at the perovskite interface and induced an extra back-surface field for electron extraction. The r...