Photoinduced charge transfer between poly(3-hexylthiophene) and germanium nanowires

Aurelien Du Pasquier, Daniel D.T. Mastrogiovanni, Lauren A. Klein, Tong Wang, Eric Garfunkel

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Abstract

Germanium nanowires (GeNWs) were used to enhance the properties of organic photovoltaic devices. GeNWs were grown to a length of 1-5 μm on Si O2 by the vapor-liquid-solid method catalyzed by 20 nm Au seeds. Once grown, the GeNWs were dispersed in solution with poly(3-hexylthiophene) and spin cast into films. The photoluminescence and external quantum efficiency of the films indicated a significant increase in exciton dissociation and photocurrent generation. The results imply that the GeNWs may act as an electron acceptor for bulk heterojunction hybrid-inorganic/organic photovoltaic devices. The impacts of GeNW on device characteristics are discussed.

Original languageEnglish
Article number183501
JournalApplied Physics Letters
Volume91
Issue number18
DOIs
Publication statusPublished - Nov 7 2007

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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