Anion Effects in Organic Dye-Sensitized Mesoscopic Solar Cells with Ionic Liquid Electrolytes: Tetracyanoborate vs Dicyanamide

doi:10.1021/jp109803n

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	Anion Effects in Organic Dye-Sensitized Mesoscopic Solar Cells with Ionic Liquid Electrolytes: Tetracyanoborate vs Dicyanamide
	Zhou, Difei 1,2; Bai, Yu 1,2; Zhang, Jing 1; Cai, Ning 1,2; Su, Mei 1,2; Wang, Yinghui 1; Zhang, Min 1; Wang, Peng 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2011-01-27
卷号	115 期号:3 页码:816-822
ISSN号	1932-7447
DOI	10.1021/jp109803n
英文摘要	We compare the impacts of tetracyanoborate and dicyanamide anions in solvent-free ionic liquid electrolytes upon the optoelectronic features of dye-sensitized solar cells based on an organic push-pull chromophore. With respect to dicyanamide, tetracyanoborate confers a bathochromic and higher photocurrent response upon a dye-coated mesoporous titania film. Numerical simulations on electrical impedance spectroscopies disclose that tetracyanoborate anion S evoke a downward displacement of the conduction-band edge of an electrolyte-sinking nanocrystalline film in comparison with dicyanamide, generating a more favorable energy-offset at the titania/dye interface and therefore a better exciton dissociation yield, as proved via the transient emission measurements. An effective recombination reaction rate constant U-0k is used to depict the charge-transfer behavior at the titania/electrolyte interface in dye-sensitized solar cells. The negative impact of an about 4 times larger U-0k of the dicyanamide cell is overwhelmed by the noticeably higher conduction band edge, leading to the experimentally observed anion-dependent open-circuit photovoltage.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000286306700031
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/73217]
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, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Difei,Bai, Yu,Zhang, Jing,et al. Anion Effects in Organic Dye-Sensitized Mesoscopic Solar Cells with Ionic Liquid Electrolytes: Tetracyanoborate vs Dicyanamide[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2011,115(3):816-822.
APA	Zhou, Difei.,Bai, Yu.,Zhang, Jing.,Cai, Ning.,Su, Mei.,...&Wang, Peng.(2011).Anion Effects in Organic Dye-Sensitized Mesoscopic Solar Cells with Ionic Liquid Electrolytes: Tetracyanoborate vs Dicyanamide.JOURNAL OF PHYSICAL CHEMISTRY C,115(3),816-822.
MLA	Zhou, Difei,et al."Anion Effects in Organic Dye-Sensitized Mesoscopic Solar Cells with Ionic Liquid Electrolytes: Tetracyanoborate vs Dicyanamide".JOURNAL OF PHYSICAL CHEMISTRY C 115.3(2011):816-822.