Absorption of silicon nanowire arrays on silicon and silica substrates

Björn C P Sturmberg*, Kokou B. Dossou, Lindsay C. Botten, Ara A. Asatryan, Christopher G. Poulton, C. Martijn de Sterke, Ross C. McPhedran

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

Nanowire arrays are promising structures for 3rd generation photovoltaics, due to their absorption enhancement over thin films and reduction in material usage. Having previously studied the absorption mechanism of silicon nanowire arrays suspended in air, we now extend the analysis to arrays on substrates. We find that the absorption mechanism continues to be dominated by one (or more) well coupled, well concentrated, resonant modes. Whilst the substrates reduce the strength of the resonances, they can simultaneously increase short wavelength absorption. The ultimate efficiency of the arrays remains significantly greater than that of silicon thin films and with a silicon substrate exceeds that of arrays suspended in air.
Original languageEnglish
Title of host publicationRenewable Energy and the Environment
Subtitle of host publicationOSA Technical Digest
Place of PublicationWashington, DC
PublisherOptical Society of America (OSA)
Pages1-3
Number of pages3
ISBN (Print)9781557529206
DOIs
Publication statusPublished - 2011
Externally publishedYes
EventOptical Nanostructures and Advanced Materials for Photovoltaics - Austin, TX
Duration: 2 Nov 20113 Nov 2011

Conference

ConferenceOptical Nanostructures and Advanced Materials for Photovoltaics
CityAustin, TX
Period2/11/113/11/11

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