An Energetic and Kinetic View on Cyclopentadithiophene Dye-Sensitized Solar Cells: The Influence of Fluorine vs Ethyl Substituent

	An Energetic and Kinetic View on Cyclopentadithiophene Dye-Sensitized Solar Cells: The Influence of Fluorine vs Ethyl Substituent
	Zhou DF ; Cai N ; Long HJ ; Zhang M ; Wang YH ; Wang P
刊名	journal of physical chemistry c
	2011
卷号	115 期号:7 页码:3163-3171
关键词	EFFICIENT MOLECULAR PHOTOVOLTAICS ORGANIC-DYES CHARGE-TRANSFER ELECTRON-TRANSFER COUMARIN DYES TIO2 RECOMBINATION PERFORMANCE TRANSPORT IMPEDANCE
ISSN号	1932-7447
通讯作者	wang p
中文摘要	a comprehensive understanding on the structure property relationship of metal-free organic chromophores in dye-sensitized solar cells will form the basis of further design of advanced materials and realization of considerable enhancement of device performance, boosting the widespread utilization of solar energy at an affordable cost. in this paper we report profound influences of the fluorine versus ethyl substituent of the cyclopentadithiophene conjugated spacer of push pull photosensitizers, upon the energetic and kinetic characteristics of dye-sensitized solar cells. joint electrochemical and spectral measurements reveal that with respect to the fluorine-containing dye, the ethyl counterpart exhibits a 0.18 v more negative excited-state redox potential upon anchoring on titania, which overwhelms the 0.01 ev upward conduction band edge shift of the dye-coated titania film. the ethyl-correlated more favorable dye/titania interface energetics benefits a remarkably higher electron injection yield, which is verified with the transient emission and photocurrent action spectrum measurements. furthermore, analysis on the electrical impedance data affords a notably smaller recombination reaction order for the cell made from the ethyl-substituting chromophore than that of the fluorine counterpart, accounting for a remarkably suppressed interfacial charge recombination with triiodide and thus explaining the observed higher open-circuit photovoltage.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000287338100033
公开日期	2012-06-11
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/44805]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Zhou DF,Cai N,Long HJ,et al. An Energetic and Kinetic View on Cyclopentadithiophene Dye-Sensitized Solar Cells: The Influence of Fluorine vs Ethyl Substituent[J]. journal of physical chemistry c,2011,115(7):3163-3171.
APA	Zhou DF,Cai N,Long HJ,Zhang M,Wang YH,&Wang P.(2011).An Energetic and Kinetic View on Cyclopentadithiophene Dye-Sensitized Solar Cells: The Influence of Fluorine vs Ethyl Substituent.journal of physical chemistry c,115(7),3163-3171.
MLA	Zhou DF,et al."An Energetic and Kinetic View on Cyclopentadithiophene Dye-Sensitized Solar Cells: The Influence of Fluorine vs Ethyl Substituent".journal of physical chemistry c 115.7(2011):3163-3171.