Vapor treatment enables efficient and stable FAPbI3 perovskite solar cells

• 作者: Hairen Tan
• 来源期刊: 中国科学：化学（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: HIGHLIGHTS
• 页码范围: 5-6
• 页数: 2页
• 语种: 英文

摘要

Metal halide perovskite solar cells(PSCs)have attracted extensive research interest in recent years due to their low-cost processing,high power conversion efficiency(PCE),and tunable bandgap enabling tandem photovoltaics(PVs).Over the past decade,PSCs have witnessed an impressive increase in PCEs from 3.8％to 25.5％,which is the highest among thin-film PV technologies and is comparable to those of crystalline silicon solar cells[1].The perovskites have a general formula of ABX3,where the A-site is methy-lammonium(MA),formamidinium(FA)or cesium(Cs),B-site is Pb or Sn,and X-site is I,Br,or Cl.The perovskite composition is finely engineered via cation and halide se-lection to obtain efficient and stable PSCs.Among the broad range of compositions,black phase(or a-phase)FAPbI3 is of intense interest for PV applications since it has a lower bandgap nearly ideal for solar cells and better thermal sta-bility than MA-containing perovskites.