| Photophysical and (photo)electrochemical properties of a coumarin dye. | |
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MedLine Citation:
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PMID: 16851443 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A new coumarin dye, cyano-{5,5-dimethyl-3-[2-(1,1,6,6-tetramethyl-10-oxo-2,3,5,6-tetrahydro-1H,4H,10H-11-oxa-3a-aza-benzo[de]anthracen-9-yl)vinyl]cyclohex-2-enylidene}-acetic acid (NKX-2753), was prepared and characterized with respect to photophysical and electrochemical properties. It was employed as a dye sensitizer in dye-sensitized solar cells and showed efficient photon-to-electron conversion properties. The photocurrent action spectrum exhibited a broad feature with a maximum incident photon-to-electron conversion efficiency (IPCE) of 84% at 540 nm, which is comparable to that for the famous red dye RuL2(NCS)2 (known as N3), where L stands for 2,2'-bipyridyl-4,4'-dicarboxylic acid. The sandwich-type solar cell with NKX-2753, under illumination of full sun (AM1.5, 100 mW cm(-2)), produced 16.1 mA cm(-2) of short-circuit photocurrent, 0.60 V of open-circuit photovoltage, and 0.69 of fill factor, corresponding to 6.7% of overall energy conversion efficiency using 0.1 M LiI, 0.05 M I2, 0.1 M guanidinium thiocyanate, and 0.6 M 1,2-dimethyl-3-n-propyl-imidazolium iodide in dry acetonitrile as redox electrolyte. In comparison with its analogue NKX-2586 (Langmuir 2004, 20, 4205), NKX-2753 with an extra side ring on the alkene chain produced much higher IPCE values at the same conditions. The side ring acted as a spacer to efficiently prevent dye aggregation when adsorbed on the TiO2 surface, resulting in significant improvements of short-circuit photocurrent, open-circuit photovoltage, and fill factor compared with NKX-2586 that aggregated on the TiO2 surface. |
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Authors:
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Zhong-Sheng Wang; Kohjiro Hara; Yasufumi Dan-oh; Chiaki Kasada; Akira Shinpo; Sadaharu Suga; Hironori Arakawa; Hideki Sugihara |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The journal of physical chemistry. B Volume: 109 ISSN: 1520-6106 ISO Abbreviation: J Phys Chem B Publication Date: 2005 Mar |
Date Detail:
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Created Date: 2006-07-20 Completed Date: 2007-05-31 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101157530 Medline TA: J Phys Chem B Country: United States |
Other Details:
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Languages: eng Pagination: 3907-14 Citation Subset: IM |
Affiliation:
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Solar Light Energy Conversion Team, Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565, Japan. zs.wang@aist.go.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Coloring Agents
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chemistry* Coumarins / chemistry* Electrochemistry Photochemistry Spectrophotometry, Ultraviolet Spectroscopy, Fourier Transform Infrared |
| Chemical | |
Reg. No./Substance:
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0/Coloring Agents; 0/Coumarins; 91-64-5/coumarin |
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