Study of optical absorbance in porous silicon nanowires for photovoltaic applications

Joël Charrier, Adel Najar, Parastesh Pirasteh

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Porous silicon nanowires (PSiNWs) layers fabrication was reported. Reflectance spectra were measured as a function of the nanowire length and were inferior to 0.1% and a strong photoluminescence (PL) signal was measured from samples. Models based on cone shape of nanowires located in circular and rectangular bases were used to calculate the reflectance using the transfer matrix formalism (TMF) of PSiNWs layer. The modeling of the reflectance permits to explain this value by taking account into the shape of the nanowires and its porosity. Optical absorbance and transmission were also theoretically studied. The absorbance was superior to that obtained with silicon nanowires and the ultimate efficiency was about equal to 25% for normal incidence angle. These results could be applied to the potential application in low-cost and high efficiency PSiNWs based solar cells. © 2013 Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)828-832
Number of pages5
JournalApplied Surface Science
Volume283
DOIs
StatePublished - Oct 2013

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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