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Cary L. Pint, Kuniharu Takei, Rehan Kapadia, Maxwell Zheng, Alexandra C. Ford, Junjun Zhang, Arash Jamshidi, Rizia Bardhan, Jeffrey J. Urban, Ming Wu, Joel W. Ager, Michael M. Oye and Ali Javey Rationally Designed, Three-Dimensional Carbon Nanotube Back-Contacts for Efficient Solar Devices Advanced Energy Materials 1

Article first published online: 26 OCT 2011 | DOI: 10.1002/aenm.201100436

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Structure matters in solar-to-fuel conversion efficiency, demonstrated for TiO2 coated onto designed three-dimensional (3-D) carbon nanofiber scaffolds. Performance enhancement of up to three times compared to flat films can be mostly attributed to structurally-enhanced carrier collection and photon management processes. Using 3-D templates to balance light absorption depth and carrier collection can lead to a new class of high efficiency and cheap energy conversion devices.

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