电化学2021，Vol.27Issue(2)：216-226,11.DOI:10.13208/j.electrochem.201249
CsPbIBr2钙钛矿太阳能电池中通过氧气诱导Spiro-OMeTAD快速氧化
Oxygen-Exposure Induced Rapid Oxidation of Spiro-OMeTAD in CsPbIBr2 Perovskite Solar Cells
摘要
Abstract
2,2',7,7'-tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9'-spirobifluorene(Spiro-OMeTAD)is the most widely used hole transport material in perovskite solar cells(PSCs).However,its oxidation in the air takes a long time and results in the attack of perovskite by water.In this regard,we performed the oxidation process of Spiro-OMeTAD in oxygen,where perovskite can be pro-tected from water,guaranteeing the integrity of perovskite.It was demonstrated that the champion Spiro-OMeTAD based CsPbIBr2 PSCs after oxygen oxidation achieved a 7.19％power conversion efficiency(PCE),showing a higher PCE than 6.29％of the cham-pion device oxidized in air.A series of electrochemical characterization methods were applied to investigate the performances of the different cell devices under different oxidation conditions.It was revealed that the oxygen oxidation enabled to enhance the hole conductivity of Spiro-OMeTAD,reduce the charge recombination and improve the charge transfer efficiency in PSCs.Moreover,the device with oxygen oxidation had a higher average efficiency and greater stability.This method makes the devices have better repeatability,which provides a reliable idea for the commercial development of PSCs.关键词
钙钛矿/Spiro-OMeTAD/快速氧化/CsPbIBr2/太阳能电池Key words
perovskite/Spiro-OMeTAD/rapid oxidation/CsPbIBr2引用本文复制引用
王伟国,白天,薛高飞,叶美丹..CsPbIBr2钙钛矿太阳能电池中通过氧气诱导Spiro-OMeTAD快速氧化[J].电化学,2021,27(2):216-226,11.基金项目
This work was supported by the National Science Foundation(No.22075237). （No.22075237）
