Optimal design of aperiodic, vertical silicon nanowire structures for photovoltaics | Zendy

Chenxi Lin | Zendy; Michelle L. Povinelli | Zendy

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Optimal design of aperiodic, vertical silicon nanowire structures for photovoltaics

Author(s) -

Chenxi Lin,

Michelle L. Povinelli

Publication year - 2011

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.19.0a1148

Subject(s) - aperiodic graph , silicon , materials science , optics , photovoltaic system , photovoltaics , transfer matrix method (optics) , transfer matrix , lattice constant , optoelectronics , physics , computer science , diffraction , mathematics , combinatorics , computer vision , ecology , biology

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.

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