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Radial pn junction nanorod solar cells: device physics principles and routes to fabrication in silicon

Kayes, Brendan M. and Richardson, Christine E. and Lewis, Nathan S. and Atwater, Harry A. (2005) Radial pn junction nanorod solar cells: device physics principles and routes to fabrication in silicon. In: Conference record of the Thirty-First IEEE Photovoltaic Specialists Conference. IEEE , Piscataway, NJ, pp. 55-58. ISBN 0-7803-8707-4 http://resolver.caltech.edu/CaltechAUTHORS:20110811-144332965

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Abstract

We have developed quantitative device-physics models for a radial pn junction nanorod solar cell, that is, a cell which consists of densely packed nanorods attached to a conducting substrate, each nanorod with a pn junction in the radial direction. It is found that this novel design shows large improvements over the planar geometry so long as two conditions are satisfied: a) a planar solar cell made from the same material is collection limited, i.e. the diffusion length of minority carriers is too low to allow for collection of most or all of the light-generated carriers in the conventional planar geometry, and b) recombination in the depletion region is not too high, or, equivalently, the lifetime of carriers in the depletion region is not too short. In order to experimentally validate this concept, the vapor-liquid-solid (VLS) growth of silicon (Si) nanorods has been explored using metal catalyst particles that are not as deleterious to the minority carrier lifetime of Si as gold (Au), the most commonly used wire growth catalyst.


Item Type:Book Section
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http://dx.doi.org/10.1109/PVSC.2005.1488067DOIUNSPECIFIED
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1488067PublisherUNSPECIFIED
Additional Information:© 2005 IEEE. Issue Date: 3-7 Jan. 2005. Date of Current Version: 08 August 2005. The authors would like to thank 3P Solar and NREL for their financial support.
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Funding AgencyGrant Number
3P SolarUNSPECIFIED
National Renewable Energy Laboratory (NREL) UNSPECIFIED
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INSPEC Accession Number8478887
Record Number:CaltechAUTHORS:20110811-144332965
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110811-144332965
Official Citation:Kayes, B.M.; Richardson, C.E.; Lewis, N.S.; Atwater, H.A.; , "Radial pn junction nanorod solar cells: device physics principles and routes to fabrication in silicon," Photovoltaic Specialists Conference, 2005. Conference Record of the Thirty-first IEEE , vol., no., pp. 55- 58, 3-7 Jan. 2005 doi: 10.1109/PVSC.2005.1488067
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24815
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:11 Aug 2011 22:09
Last Modified:11 Aug 2011 22:09

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