Joint electrical, photophysical and computational studies on D-pi-A dye sensitized solar cells: the impacts of dithiophene rigidification

doi:10.1039/c2sc00973k

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	Joint electrical, photophysical and computational studies on D-pi-A dye sensitized solar cells: the impacts of dithiophene rigidification
	Xu, Mingfei 1; Zhang, Min 1; Pastore, Mariachiara 2; Li, Renzhi 1; De Angelis, Filippo 2; Wang, Peng 1
刊名	CHEMICAL SCIENCE
	2012
卷号	3 期号:4 页码:976-983
ISSN号	2041-6520
DOI	10.1039/c2sc00973k
英文摘要	The rigidification of pi-conjugated segments represents a feasible tactic towards energy-level engineering of organic D-pi-A dyes in mesoscopic titania solar cells. In this work, comparions of four dyes with the di(3-hexylthiophene), dihexyldithienosilole, dihexylcyclopentadithiophene and N-hexyldithienopyrrole linkers have revealed some general influences of pi-linker rigidification on the optoelectronic features of titania solar cells employing a cobalt(II/III) redox electrolyte, in terms of energetic and kinetic viewpoints. Compared to a dye with the di(3-hexylthiophene) linker, its three counterparts with rigidified dithiophene blocks present bathochromic and hyperchromic absorptions of solar photons. Transient absorption measurements have shown that the incorporation of Si-, C-and N-bridged dithiophene segments decelerates the dye regeneration kinetics. The rigidification of pi-conjugated dithiophene linkers brings forth a general open-circuit photovoltage diminishment, in the range from 60 to 190 mV. Further insightful impedance analyses have disclosed that the open-circuit photovoltage reduction, due to the pi-linker alternation from di(3-hexylthiophene) to N-hexyldithienopyrrole, is predominantly caused by an adverse downward displacement of the titania conduction band edge, despite a positive contribution from attenuated charge recombination at the titania/electrolyte interface.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000301122000005
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/49457]
专题	中国科学院化学研究所
通讯作者	Li, Renzhi
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Perugia, Dipartimento Chim, Ist CNR Sci & Tecnol Mol CNR ISTM, I-06123 Perugia, Italy
推荐引用方式 GB/T 7714	Xu, Mingfei,Zhang, Min,Pastore, Mariachiara,et al. Joint electrical, photophysical and computational studies on D-pi-A dye sensitized solar cells: the impacts of dithiophene rigidification[J]. CHEMICAL SCIENCE,2012,3(4):976-983.
APA	Xu, Mingfei,Zhang, Min,Pastore, Mariachiara,Li, Renzhi,De Angelis, Filippo,&Wang, Peng.(2012).Joint electrical, photophysical and computational studies on D-pi-A dye sensitized solar cells: the impacts of dithiophene rigidification.CHEMICAL SCIENCE,3(4),976-983.
MLA	Xu, Mingfei,et al."Joint electrical, photophysical and computational studies on D-pi-A dye sensitized solar cells: the impacts of dithiophene rigidification".CHEMICAL SCIENCE 3.4(2012):976-983.