Three-dimensional nanopillar-array photovoltaics on low-cost and flexible substrates

Fan, Zhiyong and Razavi, Haleh and Do, Jae-won and Moriwaki, Aimee and Ergen, Onur and Chueh, Yu-Lun and Leu, Paul W. and Ho, Johnny C. and Takahashi, Toshitake and Reichertz, Lothar A. and Neale, Steven and Yu, Kyoungsik and Wu, Ming and Ager, Joel W. and Javey, Ali. (2009) Three-dimensional nanopillar-array photovoltaics on low-cost and flexible substrates. Nature Materials, 8 (8). p. 648. ISSN 1476-1122

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Solar energy represents one of the most abundant and yet least harvested sources of renewable energy. In recent years, tremendous progress has been made in developing photovoltaics that can be potentially mass deployed1, 2, 3. Of particular interest to cost-effective solar cells is to use novel device structures and materials processing for enabling acceptable efficiencies4, 5, 6. In this regard, here, we report the direct growth of highly regular, single-crystalline nanopillar arrays of optically active semiconductors on aluminium substrates that are then configured as solar-cell modules. As an example, we demonstrate a photovoltaic structure that incorporates three-dimensional, single-crystalline n-CdS nanopillars, embedded in polycrystalline thin films of p-CdTe, to enable high absorption of light and efficient collection of the carriers. Through experiments and modelling, we demonstrate the potency of this approach for enabling highly versatile solar modules on both rigid and flexible substrates with enhanced carrier collection efficiency arising from the geometric configuration of the nanopillars.

Item Type: Article
Additional Information: Abstract reprinted by permission from Macmillan Publishers Ltd., copyright 2009.
Collections: Nanomanufacturing Research Collection
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Depositing User: Rebecca Reznik-Zellen
Date Deposited: 05 Nov 2009 14:56
Last Modified: 08 Feb 2010 15:44

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