Perylene diimides: a thickness-insensitive cathode interlayer for high performance polymer solar cells

doi:10.1039/c4ee00022f

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	Perylene diimides: a thickness-insensitive cathode interlayer for high performance polymer solar cells
	Zhang, Zhi-Guo; Qi, Boyuan; Jin, Zhiwen; Chi, Dan; Qi, Zhe; Li, Yongfang; Wang, Jizheng
刊名	ENERGY & ENVIRONMENTAL SCIENCE
	2014-06-01
卷号	7 期号:6 页码:1966-1973
ISSN号	1754-5692
DOI	10.1039/c4ee00022f
英文摘要	With the power conversion efficiency of polymer solar cells (PSCs) approaching the milestone value of 10%, their instability associated with a low work function metal cathode, particularly in the presence of oxygen and moisture, becomes a critical issue for real applications. To alleviate the air-sensitive problem, two easy-accessible solution-processed, environmentally friendly organic small-molecule cathode interlayers, with perylene diimides (PDI) as the core and amino (PDIN) or amino N-oxide (PDINO) as the terminal substituent, are explored. Benefitting from the extended planar structure of the PDI units, the two interlayer materials show high conductivities of similar to 10(-5) S cm(-1). This is the first time that thickness-insensitive small-molecule-based cathode interlayers are reported. It is also found that the work function tuning effect of the two PDI-based interlayers allows high work function metals (such as Au and Ag) to act as the cathode. With the conventional device structure with PTB7 as a donor and PC70BM as an acceptor, the PDINO-based devices exhibit an efficiency of 8.24% with Al as the top electrode and 8.16% with Ag as the top electrode, much higher than that of the corresponding Ca/Al-based device (6.98%). The high efficiency of 8.35% is also achieved in the device with PTB7-Th as the donor. The success of the two PDI-interlayers indicates that pi-delocalized planar structures with high electron affinities could be particularly useful in developing high-performance organic interlayer materials.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000336831700019
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/52287]
专题	中国科学院化学研究所
通讯作者	Zhang, Zhi-Guo
作者单位	Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhi-Guo,Qi, Boyuan,Jin, Zhiwen,et al. Perylene diimides: a thickness-insensitive cathode interlayer for high performance polymer solar cells[J]. ENERGY & ENVIRONMENTAL SCIENCE,2014,7(6):1966-1973.
APA	Zhang, Zhi-Guo.,Qi, Boyuan.,Jin, Zhiwen.,Chi, Dan.,Qi, Zhe.,...&Wang, Jizheng.(2014).Perylene diimides: a thickness-insensitive cathode interlayer for high performance polymer solar cells.ENERGY & ENVIRONMENTAL SCIENCE,7(6),1966-1973.
MLA	Zhang, Zhi-Guo,et al."Perylene diimides: a thickness-insensitive cathode interlayer for high performance polymer solar cells".ENERGY & ENVIRONMENTAL SCIENCE 7.6(2014):1966-1973.