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Opt Express. 2011 Sep 12;19 Suppl 5:A1148-54. doi: 10.1364/OE.19.0A1148.

Optimal design of aperiodic, vertical silicon nanowire structures for photovoltaics.

Author information

1
Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, CA, USA. chenxil@usc.edu

Abstract

We design a partially aperiodic, vertically-aligned silicon nanowire array that maximizes photovoltaic absorption. The optimal structure is obtained using a random walk algorithm with transfer matrix method based electromagnetic forward solver. The optimal, aperiodic structure exhibits a 2.35 times enhancement in ultimate efficiency compared to its periodic counterpart. The spectral behavior mimics that of a periodic array with larger lattice constant. For our system, we find that randomly-selected, aperiodic structures invariably outperform the periodic array.

PMID:
21935258
DOI:
10.1364/OE.19.0A1148

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