Heterojunction Photovoltaics Using GaAs Nanowires and Conjugated Polymers

Ren, Shenqiang and Zhao, Ni and Crawford, Samuel C. and Tambe, Michael and Bulović, Vladimir and Gradečak, Silvija. (2011) Heterojunction Photovoltaics Using GaAs Nanowires and Conjugated Polymers. Nano Letters, 11 (2). p. 408. ISSN 1530-6984

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We demonstrate an organic/inorganic solar cell architecture based on a blend of poly(3-hexylthiophene) (P3HT) and narrow bandgap GaAs nanowires. The measured increase of device photocurrent with increased nanowire loading is correlated with structural ordering within the active layer that enhances charge transport. Coating the GaAs nanowires with TiOx shells passivates nanowire surface states and further improves the photovoltaic performance. We find that the P3HT/nanowire cells yield power conversion efficiencies of 2.36% under white LED illumination for devices containing 50 wt % of TiOx-coated GaAs nanowires. Our results constitute important progress for the use of nanowires in large area solution processed hybrid photovoltaic cells and provide insight into the role of structural ordering in the device performance. Keywords (keywords): III-V Nanowires; conjugated polymers; bulk heterojunction solar cell; self-assembly; and molecular ordering

Item Type: Article
InterNano Taxonomy: Nanoscale Objects and Nanostructured Materials > Nanowires
Areas of Application > Energy and Utilities
Collections: Nanomanufacturing Research Collection
Depositing User: Amulya Gullapalli
Date Deposited: 13 Jul 2011 01:51
Last Modified: 13 Jul 2011 01:51
URI: http://eprints.internano.org/id/eprint/627

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