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Anion Effects in Organic Dye-Sensitized Mesoscopic Solar Cells with Ionic Liquid Electrolytes: Tetracyanoborate vs Dicyanamide
Zhou, Difei1,2; Bai, Yu1,2; Zhang, Jing1; Cai, Ning1,2; Su, Mei1,2; Wang, Yinghui1; Zhang, Min1; Wang, Peng1
2011-01-27
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume115Issue:3Pages:816-822
AbstractWe 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.
DOI10.1021/jp109803n
Indexed BySCI
Language英语
WOS IDWOS:000286306700031
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/73218
Collection中国科学院化学研究所
Corresponding AuthorWang, Peng
Affiliation1.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
Recommended Citation
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.
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