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Wafer-Scale Growth of Silicon Microwire Arrays for Photovoltaics and Solar Fuel Generation

Tamboli, Adele C. and Chen, Christopher T. and Warren, Emily L. and Turner-Evans, Daniel B. and Kelzenberg, Michael D. and Lewis, Nathan S. and Atwater, Harry A. (2012) Wafer-Scale Growth of Silicon Microwire Arrays for Photovoltaics and Solar Fuel Generation. IEEE Journal of Photovoltaics, 2 (3). pp. 294-297. ISSN 2156-3381. http://resolver.caltech.edu/CaltechAUTHORS:20130607-081714418

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Abstract

Silicon microwire arrays have recently demonstrated their potential for low-cost, high-efficiency photovoltaics and photoelectrochemical fuel generation. A remaining challenge to making this technology commercially viable is scaling up of microwirearray growth. We discuss here a technique for vapor–liquid–solid growth of microwire arrays on the scale of six-inch wafers using a cold-wall radio-frequency heated chemical vapor deposition furnace, enabling fairly uniform growth over large areas with rapid cycle time and improved run-to-run reproducibility. We have also developed a technique to embed these large-area wire arrays in polymer and to peel them intact from the growth substrate, which could enable lightweight, flexible solar cells with efficiencies as high as multicrystalline Si solar cells. We characterize these large-area microwire arrays using scanning electronmicroscopy and confocal microscopy to assess their structure and fidelity, and we test their energy-conversion properties using a methyl viologen (MV^(2+/+) ) liquid junction contact in a photoelectrochemical cell. Initial photoelectrochemical conversion efficiencies suggest that the material quality of these microwire arrays is similar to smaller (∼1 cm^2 ) wire arrays that we have grown in the past, indicating that this technique is a viable way to scale up microwire-array devices.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6187686PublisherArticle
http://dx.doi.org/10.1109/JPHOTOV.2012.2191941 DOIArticle
ORCID:
AuthorORCID
Chen, Christopher T.0000-0001-5848-961X
Warren, Emily L.0000-0001-8568-7881
Lewis, Nathan S.0000-0001-5245-0538
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2012 IEEE. Manuscript received July 11, 2011; revised March 7, 2012; accepted March 19, 2012. Date of publication April 19, 2012; date of current version June 18, 2012. This work was supported in part by the Defense Advanced Research Projects Agency under Contract W911NF-09-2-0011 and in part by the U.S. Department of Energy under Grant DE-FG02-05ER15754. The authors would like to thank A. Leenheer for assistance with confocal microscopy measurements. Facilities for wafer preparation were provided by the Kavli Nanoscience Institute at Caltech. D. B. Turner-Evans acknowledges support from a National Science Foundation graduate fellowship.
Group:Kavli Nanoscience Institute
Funders:
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)W911NF-09-2-0011
Department of Energy (DOE)DE-FG02-05ER15754
NSF Graduate Research FellowshipUNSPECIFIED
Subject Keywords:Microwire; nanowire; photoelectrochemical; photovoltaic
Record Number:CaltechAUTHORS:20130607-081714418
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130607-081714418
Official Citation:Tamboli, A. C.; Chen, C. T.; Warren, E. L.; Turner-Evans, D. B.; Kelzenberg, M. D.; Lewis, N. S.; Atwater, H. A., "Wafer-Scale Growth of Silicon Microwire Arrays for Photovoltaics and Solar Fuel Generation," Photovoltaics, IEEE Journal of , vol.2, no.3, pp.294,297, July 2012
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38847
Collection:CaltechAUTHORS
Deposited By: John Wade
Deposited On:07 Jun 2013 15:45
Last Modified:22 Sep 2017 21:33

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