摘要
Summary of main observation and conclusion The small organic molecular Dioctylbenzothienobenzothiophene(C8-BTBT)has been explored as hole transport material(HTM)to replace PEDOT:PSS in inverted perovskite solar cells(PVSCs).MAPbl3 perovskite films depositd onto C8-BTBT are smooth and uniform,with negligible residual of Pbl2 and large grain size even larger than 1μm.Our champion C8-BTBT based devices reached a high power conversion efficiency(PCE)of 15.46%with marginal hysteresis,much higher than that of 11.50%achieved using PEDOT:PSS.Besides,devices adopting C8-BTBT as substrate show superior stability compared with the PEDOT:PSS based devices when stored under ambient conditions with a relative humidity of(25+5)%.
基金
This work is supported by the National Natural Science Foundation of China(Nos.51620105006,61721005,51973184)
Zhejiang Province Science and Technology Plan(No.2018C01047)
the Inter national Science and Technology Cooperation Program of China(ISTCP)(Grant No.2016YFE0102900)
the Key Research Project of Southern Xinjiang(Grant No.2019DB013).
