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Proceedings Paper

Periodic arrays of ridge apertures as a high efficiency coupler for photovoltaic applications
Author(s): Edward C. Kinzel; Pornsak Srisungsitthisunti; Xianfan Xu
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Paper Abstract

Weak absorption of light near the band gap is one limiting factor on the efficiency of photovoltaics. This is particularly true for thin-film solar cells because the short optical path lengths and limited options for texturing the front and back surfaces. Scattering light laterally is one way to increase the optical path length to increase the chance that a given low energy photon is absorbed. We investigate the use of a periodic array of bowtie apertures to couple incident light to parallel plate waveguide modes supported between two conductors. We show that this increases the efficiency of solar cells by 39% and explain the physical mechanisms. This architecture has potential for thin film photovolatics or for forming an intermediate conductor in multi-junction solar cells.

Paper Details

Date Published: 24 August 2010
PDF: 6 pages
Proc. SPIE 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion, 777208 (24 August 2010); doi: 10.1117/12.859888
Show Author Affiliations
Edward C. Kinzel, Purdue Univ. (United States)
Pornsak Srisungsitthisunti, Purdue Univ. (United States)
Xianfan Xu, Purdue Univ. (United States)

Published in SPIE Proceedings Vol. 7772:
Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion
Loucas Tsakalakos, Editor(s)

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