Influence of the pattern shape on the efficiency of front-side periodically patterned ultrathin crystalline silicon solar cells

Aline Herman, Christos Trompoukis, Valérie Depauw, Ounsi El Daif, Olivier Deparis

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Patterning the front side of an ultrathin crystalline silicon (c-Si) solar cell helps keeping the energy conversion efficiency high by compensating for the light absorption losses. A super-Gaussian mathematical expression was used in order to encompass a large variety of nanopattern shapes and to study their influence on the optical performance. We prove that the enhancement in the maximum achievable photo-current is due to both impedance matching condition at short wavelengths and to the wave nature of light at longer wavelengths. We show that the optimal mathematical shape and parameters of the pattern depend on the c-Si thickness. An optimal shape comes with a broad optimal parameter zone where experimental inaccuracies have much less influence on the efficiency. We prove that cylinders are not the best suited shape. To compare our model with a real slab, we fabricated a nanopatterned c-Si slab via nano imprint lithography.

Original languageEnglish
Article number113107
JournalJournal of Applied Physics
Volume112
Issue number11
DOIs
Publication statusPublished - 1 Dec 2012
Externally publishedYes

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solar cells
slabs
impedance matching
energy conversion efficiency
silicon
electromagnetic absorption
wavelengths
lithography
augmentation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Influence of the pattern shape on the efficiency of front-side periodically patterned ultrathin crystalline silicon solar cells. / Herman, Aline; Trompoukis, Christos; Depauw, Valérie; El Daif, Ounsi; Deparis, Olivier.

In: Journal of Applied Physics, Vol. 112, No. 11, 113107, 01.12.2012.

Research output: Contribution to journalArticle

Herman, Aline ; Trompoukis, Christos ; Depauw, Valérie ; El Daif, Ounsi ; Deparis, Olivier. / Influence of the pattern shape on the efficiency of front-side periodically patterned ultrathin crystalline silicon solar cells. In: Journal of Applied Physics. 2012 ; Vol. 112, No. 11.
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