Journal
NANO LETTERS
Volume 7, Issue 11, Pages 3372-3376Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl071656u
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We compare a series of molecular sensitizers in dye-sensitized solar cells containing the organic hole transporter 2,2',7,7'-tetrakis(NN-di-p-methoxypheny-amine)-9,9'-spirobifluorene (spiro-MeOTAD). Charge recombination is reduced by the presence of ion-coordinating moieties on the dye, with the longest electron lifetime and highest solar cell efficiency achieved using a novel sensitizer with diblock alkoxy-alkane pendent groups. By further increasing the optical path length in the active layer, we achieve a power conversion efficiency of over 5% under OF simulated sun light.
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