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Nano Lett. 2007 Nov;7(11):3372-6. Epub 2007 Oct 5.

Efficiency enhancements in solid-state hybrid solar cells via reduced charge recombination and increased light capture.

Author information

1
Institut de Chimie Physique, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland. h.snaith1@physics.ox.ac.uk

Abstract

We compare a series of molecular sensitizers in dye-sensitized solar cells containing the organic hole transporter 2,2',7,7'-tetrakis(N,N-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 simulated sun light.

PMID:
17918905
DOI:
10.1021/nl071656u

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