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Optimal design of laterally assembled hexagonal silicon nanowires for broadband absorption enhancement in ultrathin solar cells.

Authors :
Shahraki, Mojtaba
Salehi, Mohammad Reza
Abiri, Ebrahim
Source :
Optical Engineering; Nov2015, Vol. 54 Issue 11, p1-6, 6p
Publication Year :
2015

Abstract

Design approaches to carry out broadband absorption in laterally assembled hexagonal silicon nanowire (NW) solar cells are investigated. Two different methods are proposed to improve the current density of silicon NW solar cells. It is observed that the key to the broadband absorption is disorder and irregularity. The first approach to reach the broadband absorption is using multiple NWs with different geometries. Nevertheless, the maximum enhancement is obtained by introducing irregular NWs. They can support more cavity modes, while scattering by NWs leads to broadening of the absorption spectra. An array of optimized irregular NWs also has preferable features compared to other broadband structures. Using irregular NW arrays, it is possible to improve the absorption enhancement of solar cells without introducing more absorbing material. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00913286
Volume :
54
Issue :
11
Database :
Complementary Index
Journal :
Optical Engineering
Publication Type :
Academic Journal
Accession number :
111415819
Full Text :
https://doi.org/10.1117/1.OE.54.11.115102