Efficient Dye-Sensitized Solar Cells with an Organic Photosensitizer Featuring Orderly Conjugated Ethylenedioxythiophene and Dithienosilole Blocks

doi:10.1021/cm9036988

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	Efficient Dye-Sensitized Solar Cells with an Organic Photosensitizer Featuring Orderly Conjugated Ethylenedioxythiophene and Dithienosilole Blocks
	Zeng, Wangdong 1,2; Cao, Yiming 1; Bai, Yu 1; Wang, Yinghui 1; Shi, Yushuai 1; Zhang, Min 1; Wang, Fangfang 1; Pan, Chunyue 2; Wang, Peng 1
刊名	CHEMISTRY OF MATERIALS
	2010-03-09
卷号	22 期号:5 页码:1915-1925
ISSN号	0897-4756
DOI	10.1021/cm9036988
英文摘要	In view of the limited ruthenium resource, metal-free organic dyes may play a prominent role in the coming large-scale application of cost-effective dye-sensitized solar cells, if their efficiency and stability can be considerably improved. In this paper we utilized a binay pi-conjugated spacer of ethylenedioxythiophene and dithienosilole to construct a high molar absorption coefficient push-pull dye, characteristic of an intramolecular charge-transfer band peaking at 584 nm measured in chloroform. In comparison with the standard ruthenium sensitizer Z907, this metal-free chromophore C219 endowed a nanocrystalline titania Film with all evident light-harvesting enhancement. leading to an unprecedented 10 0- 10 3% efficiency at the AM 1 5G conditions for dye-sensitized solar cells with nonruthenium dyestuffs, although a highly volatile electrolyte was used. Transient absorption measurements have revealed that even if the kinetics of back-electron transfer and dye regeneration am considerably different for Z907 and C219, the branching ratios of these two charge-transfer channels are over 35 for both dyes, ensuring a high yield of net charge separation at the titania/dye/electrolyte interface. A solvent-free ionic liquid cell with C219 as the sensitizer exhibited an impressive efficiency or 8 9% under a low light intensity of 14.39 mW cm(-2), making it very favorable for the indoor application of flexible dye-sensitized solar cells.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000274929000040
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/69059]
专题	中国科学院化学研究所
通讯作者	Wang, Peng
作者单位	1.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Changchun 130022, Peoples R China 2.Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Wangdong,Cao, Yiming,Bai, Yu,et al. Efficient Dye-Sensitized Solar Cells with an Organic Photosensitizer Featuring Orderly Conjugated Ethylenedioxythiophene and Dithienosilole Blocks[J]. CHEMISTRY OF MATERIALS,2010,22(5):1915-1925.
APA	Zeng, Wangdong.,Cao, Yiming.,Bai, Yu.,Wang, Yinghui.,Shi, Yushuai.,...&Wang, Peng.(2010).Efficient Dye-Sensitized Solar Cells with an Organic Photosensitizer Featuring Orderly Conjugated Ethylenedioxythiophene and Dithienosilole Blocks.CHEMISTRY OF MATERIALS,22(5),1915-1925.
MLA	Zeng, Wangdong,et al."Efficient Dye-Sensitized Solar Cells with an Organic Photosensitizer Featuring Orderly Conjugated Ethylenedioxythiophene and Dithienosilole Blocks".CHEMISTRY OF MATERIALS 22.5(2010):1915-1925.