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• W1969888537 endingPage "1971" @default.
• W1969888537 startingPage "1961" @default.
• W1969888537 abstract "Two donor–acceptor organic dyes have been synthesized that differ only by a two-heteroatom change from oxygen to sulfur within the donor unit. The two dyes, (E)-3-(5-(4-(bis(4-(hexyloxy)phenyl)amino)phenyl)thiophen-2-yl)-2-cyanoprop-2-enoic acid (Dye-O) and (E)-3-(5-(4-(bis(4-(hexylthio)phenyl)amino)phenyl)thiophen-2-yl)-2-cyanoprop-2-enoic acid) (Dye-S), were tested in solar cell devices employing both I3–/I–-based and [Co(bpy)3]3+/2+ redox mediators. Power conversion efficiencies over 6% under simulated AM 1.5 illumination (1 Sun) were achieved in both electrolytes. Despite similar optical and redox properties for the two dyes, a consistently higher open-circuit voltage (Voc) was measured for Dye-S relative to Dye-O. The improved efficiency observed with Dye-S in an iodide redox mediator is against the commonly held view that sulfur atoms promote charge recombination attributed to inner-sphere interactions. Detailed mechanistic studies revealed that this is a consequence of a 25-fold enhancement of the regeneration rate constant that enhances the regeneration yield under open circuit conditions. The data show that a high short circuit photocurrent does not imply optimal regeneration efficiency as is often assumed." @default.
• W1969888537 created "2016-06-24" @default.
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• W1969888537 date "2013-01-29" @default.
• W1969888537 modified "2023-09-27" @default.
• W1969888537 title "Atomic Level Resolution of Dye Regeneration in the Dye-Sensitized Solar Cell" @default.
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• W1969888537 doi "https://doi.org/10.1021/ja311640f" @default.
• W1969888537 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23305253" @default.
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