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Macroporous Silicon as a Model for Silicon Wire Array Solar Cells

Maiolo, James R., III and Atwater, Harry A. and Lewis, Nathan S. (2008) Macroporous Silicon as a Model for Silicon Wire Array Solar Cells. Journal of Physical Chemistry C, 112 (15). pp. 6194-6201. ISSN 1932-7447. doi:10.1021/jp711340b.

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Macroporous silicon samples have been investigated in photoelectrochemical cells, and their behavior has been compared to that of conventional, planar, Si/liquid junctions. The liquid electrolyte junction provided a conformal contact to the macroporous Si and allowed assessment of the trade-offs between increased surface area and decreased carrier collection distances in such systems relative to the behavior of planar semiconductor/liquid photoelectrochemical junctions. The electrolyte contained the dimethylferrocene/dimethylferrocenium redox system in methanol because this system has been shown previously to produce bulk recombination-diffusion-limited contacts at planar Si(100) electrodes under 100 mW cm^(-2) of simulated air mass 1.5 illumination. Introduction of a network of ∼2−3 μm diameter, ∼80 μm long pores into the Si was found to slightly reduce the short-circuit photocurrent density and the open-circuit voltage of the system, but energy-conversion efficiencies in excess of 10% were nevertheless obtained from such samples. This system therefore validates the concept of using interpenetrating networks to produce efficient solar energy conversion devices in systems that do not have long carrier collection distances.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Atwater, Harry A.0000-0001-9435-0201
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 2008 American Chemical Society. Received: November 30, 2007; In Final Form: January 22, 2008. Publication Date (Web): March 26, 2008. We thank the Department of Energy, Office of Basic Energy Sciences, and BP for support of this work and acknowledge the American Society for Engineering Education National Defense Science and Engineering Grant for a graduate fellowship to J.R.M.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Issue or Number:15
Record Number:CaltechAUTHORS:20170419-085849940
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Official Citation:Macroporous Silicon as a Model for Silicon Wire Array Solar Cells James R. Maiolo, III, Harry A. Atwater, and Nathan S. Lewis The Journal of Physical Chemistry C 2008 112 (15), 6194-6201 DOI: 10.1021/jp711340b
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76661
Deposited By: Tony Diaz
Deposited On:19 Apr 2017 16:26
Last Modified:15 Nov 2021 17:01

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