Optimal design of aperiodic, vertical silicon nanowire structures for photovoltaics

Chenxi Lin, Michelle L. Povinelli
2011 Optics Express  
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
more » ... ed, aperiodic structures invariably outperform the periodic array.
doi:10.1364/oe.19.0a1148 pmid:21935258 fatcat:od73a3hce5hnhmaum5diebiemi