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8‐Hydroquinolatolithium as a Highly Effective Solution‐Processable Cathode Interfacial Material in Inverted Perovskite Solar Cells with an Efficiency Over 19%
Author(s) -
Ye Senyun,
Rao Haixia,
Zhang Dongyang,
Bian Mengying,
Zhao Zifeng,
Gu Feidan,
Zhao Ziran,
Chen Yinlin,
Zhou Huiqiong,
Liu Zhiwei,
Bian Zuqiang,
Huang Chunhui
Publication year - 2018
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201800084
Subject(s) - cathode , materials science , work function , perovskite (structure) , energy conversion efficiency , perovskite solar cell , layer (electronics) , optoelectronics , electrode , chemical engineering , nanotechnology , chemistry , engineering
The solution‐processed 8‐hydroquinolatolithium (Liq) has first been demonstrated as a highly effective cathode interfacial layer (CIL) in inverted perovskite solar cells (PSCs). Compared with the control device without a CIL, the Liq‐based device possesses a faster charge transport rate, a lower surface work function of Ag electrode, a larger built‐in potential, and a higher charge recombination resistance, probably due to the formed interface dipole between [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester (PCBM) and Ag induced by Liq, which eventually results in a great improvement of device performance. After optimization, the Liq‐based PSC has achieved a power conversion efficiency higher than 19%. These results will assuredly expand the present limited range of available solution‐processable cathode interfacial materials for low‐cost high‐performance PSCs.