Ionic liquids with variable cations as cathode interlayer for conventional polymer solar cells

doi:10.1016/j.orgel.2016.12.011

	Ionic liquids with variable cations as cathode interlayer for conventional polymer solar cells
	Zhou, Lingyu 1,2; Yu, Shuwen 1; Fu, Ping 1; Guo, Xin 1; Li, Can 1; Yu, Wei 1
刊名	ORGANIC ELECTRONICS
	2017-03-01
卷号	42 页码:387-392
关键词	Conventional Polymer Solar Cells Ionic Liquids Cathode Interlayer Mobility
ISSN号	1566-1199
DOI	10.1016/j.orgel.2016.12.011
文献子类	Article
英文摘要	Interfacial layer materials have been demonstrated to be crucial for high-efficiency polymer solar cells (PSCs). In this work, we use ionic liquid (IL) as cathode interfacial layer (CIL) for highly efficient conventional PSCs (c-PSCs) and investigate functions of ILs with different cations and substituents. Employing IL as the CIL, PBDITT-C:PC71BM-based c-PSC affords a power conversion efficiency (PCE) of 7.29%, much higher than that without the CIL (2.78%) and that with Ca/Al electrode (6.18%). When the photoactive layer is a PTB7-Th:PC71BM blend, a higher PCE of 8.67% can be obtained. The Its reduce the energy barrier due to the existence of interfacial dipole in c-PSCs, leading to increased electron and hole mobilities, reduced series resistance and enhanced contact at the cathode interface. Meanwhile, alkyl chain-substituted ILs offer higher fill factor and PCE than aromatic groups-substituted analogue, which is mainly contributed to more balanced electron and hole mobilities. This work suggests that the ILs are qualified candidates as the CIL for c-PSCs and that one should take the substitution effect into account when choosing a CIL from a large library of materials. (C) 2016 Published by Elsevier B.V.
WOS关键词	ELECTRON-TRANSPORT ; EFFICIENCY ; LAYER ; ACCEPTOR ; PERFORMANCE
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000393245300052
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169698]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Guo, Xin; Li, Can
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Lingyu,Yu, Shuwen,Fu, Ping,et al. Ionic liquids with variable cations as cathode interlayer for conventional polymer solar cells[J]. ORGANIC ELECTRONICS,2017,42:387-392.
APA	Zhou, Lingyu,Yu, Shuwen,Fu, Ping,Guo, Xin,Li, Can,&Yu, Wei.(2017).Ionic liquids with variable cations as cathode interlayer for conventional polymer solar cells.ORGANIC ELECTRONICS,42,387-392.
MLA	Zhou, Lingyu,et al."Ionic liquids with variable cations as cathode interlayer for conventional polymer solar cells".ORGANIC ELECTRONICS 42(2017):387-392.