Additive Engineering toward High‐Performance Tin Perovskite Solar Cells

• DOI: 10.1002/solr.202100034
• Publication Date: 2021-03-04T17:10:21Z
• Authors: Tianhao Wu; Danyu Cui; Xiao Liu; Xinhui Luo; Hongzhen Su; Hiroshi Segawa; Yiqiang Zhang; Yanbo Wang; Liyuan Han
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Perovskite solar cells (PSCs) have emerged as one of the third‐generation photovoltaic technologies. However, toxicity issue lead element in perovskite absorbers hinders their large‐scale production. Thus, exploiting lead‐free materials becomes an important solution to overcome this challenge. Among all candidates, tin perovskites advanced rapidly recent years due low toxicity, favorable bandgap, and high carrier mobility. After a few development, highest power conversion efficiency (PCE) PSCs has exceeded 13%, which is mainly attributed breakthroughs arising from additive engineering Sn layer. Herein, role research community emphasized. First, crystal structure, electronic characteristics, chemical instability are introduced. Next, additives used for stabilizing 2+ components, purifying SnI 2 sources, improving quality films discussed detail. Finally, challenges perspectives laid out advance properties halide further device stability.