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dc.contributor.author Jeong, Nak Cheon ko
dc.contributor.author Son, Ho-Jin ko
dc.contributor.author Prasittichai, Chaiya ko
dc.contributor.author Lee, Chang Yeon ko
dc.contributor.author Jensen, Rebecca A. ko
dc.contributor.author Farha, Omar K. ko
dc.contributor.author Hupp, Joseph T. ko
dc.date.available 2017-07-11T06:42:03Z -
dc.date.created 2017-04-10 -
dc.date.issued 2012-12 -
dc.identifier.citation Journal of the American Chemical Society, v.134, no.48, pp.19820 - 19827 -
dc.identifier.issn 0002-7863 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/3310 -
dc.description.abstract Dye-sensitized solar cells, especially those comprising molecular chromophores and inorganic titania, have shown promise as an alternative to silicon for photovoltaic light-to-electrical energy conversion. Co-sensitization (the use of two or more chromophores having complementary absorption spectra) has attracted attention as a method for harvesting photons over a broad spectral range. If implemented successfully, then cosensitization can substantially enhance photocurrent densities and light-to-electrical energy conversion efficiencies. In only a few cases, however, have significant overall improvements been obtained. In most other cases, inefficiencies arise due to unconstructive energy or charge transfer between chromophores or, as we show here, because of modulation of charge-recombination behavior. Spatial isolation of differing chromophores offers a solution. We report a new and versatile method for fabricating two-color photoanodes featuring spatially isolated chromophore types that are selectively positioned in desired zones. Exploiting this methodology, we find that photocurrent densities depend on both the relative and absolute positions of chromophores and on "local" effective electron collection lengths. One version of the two-color photoanode, based on an organic push-pull dye together with a porphyrin dye, yielded high photocurrent densities (JSC = 14.6 mA cm-2) and double the efficiency of randomly mixed dyes, once the dyes were optimally positioned with respect to each other. We believe that the organizational rules and fabrication strategy will prove transferrable, thereby advancing understanding of panchromatic sensitization as well as yielding higher efficiency devices. © 2012 American Chemical Society. -
dc.publisher American Chemical Society -
dc.subject Absolute Position -
dc.subject Broad Spectral -
dc.subject Charge Transfer -
dc.subject Chemical Structure -
dc.subject Chromatophore -
dc.subject Chromophores -
dc.subject Co-Sensitization -
dc.subject Controlled Study -
dc.subject Conversion Efficiency -
dc.subject Density -
dc.subject Dye-Sensitized Solar Cell -
dc.subject Electrochemical Solar Cells -
dc.subject Electrochemistry -
dc.subject Electrode -
dc.subject Electron Collections -
dc.subject Fabrication Strategies -
dc.subject Higher Efficiency -
dc.subject Light -
dc.subject Microtechnology -
dc.subject Mixed Dyes -
dc.subject Photo-Anode -
dc.subject Photo-Anodes -
dc.subject Photo-Electrodes -
dc.subject Photocurrent Density -
dc.subject Photocurrents -
dc.subject Photovoltaic -
dc.subject Porphyrin -
dc.subject Porphyrins -
dc.subject Sensitization -
dc.subject Solar Cells -
dc.subject Spatial Isolation -
dc.subject Spatial Separation -
dc.subject Thickness -
dc.subject Titania -
dc.subject Titanium Dioxide -
dc.subject Two-Color -
dc.subject Versatile Methods -
dc.title Effective Panchromatic Sensitization of Electrochemical Solar Cells: Strategy and Organizational Rules for Spatial Separation of Complementary Light Harvesters on High-Area Photoelectrodes -
dc.type Article -
dc.identifier.doi 10.1021/ja308725r -
dc.identifier.wosid 000311869600051 -
dc.identifier.scopusid 2-s2.0-84870698595 -
dc.type.local Article(Overseas) -
dc.type.rims ART -
dc.description.journalClass 1 -
dc.contributor.nonIdAuthor Son, Ho-Jin -
dc.contributor.nonIdAuthor Prasittichai, Chaiya -
dc.contributor.nonIdAuthor Lee, Chang Yeon -
dc.contributor.nonIdAuthor Jensen, Rebecca A. -
dc.contributor.nonIdAuthor Farha, Omar K. -
dc.contributor.nonIdAuthor Hupp, Joseph T. -
dc.identifier.citationVolume 134 -
dc.identifier.citationNumber 48 -
dc.identifier.citationStartPage 19820 -
dc.identifier.citationEndPage 19827 -
dc.identifier.citationTitle Journal of the American Chemical Society -
dc.type.journalArticle Article -
dc.contributor.affiliatedAuthor Jeong, Nak Cheon -
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Department of Physics and Chemistry Supramolecular Inorganic Chemistry Laboratory 1. Journal Articles

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