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Journal of Nanophotonics

Absorption enhancement in thin-film silicon solar cells by two-dimensional periodic nanopatterns
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Paper Abstract

A major problem of current silicon thin film solar cells lies in low carrier collection efficiency due to short carrier diffusion length. Instead of improving the collection efficiency in a relatively thick solar cell, increasing light absorption while still keeping the active layer thin is an alternative solution. Absorption enhancement in a thin film Si solar cell by incorporating a two-dimensional periodic metallic nanopattern was investigated using three-dimensional finite element analysis. By studying the enhancement effect brought by different materials, dimensions, coverage, and dielectric environments of the metal nanopattern, we found that absorption enhancement occurs at wavelength range outside surface plasmons resonance of the nanostructures. The exploitation of the nanostructures also enhances the Fabry-Perot resonance in the active layer. It plays an important role in optimizing the absorption of the solar cell.

Paper Details

Date Published: 1 August 2010
PDF: 9 pages
J. Nanophoton. 4(1) 043515 doi: 10.1117/1.3490295
Published in: Journal of Nanophotonics Volume 4, Issue 1
Show Author Affiliations
Shaomin Wu, The Univ. of Texas at Austin (United States)
Wei Wang, The Univ. of Texas at Austin (United States)
Kitt C. Reinhardt, Air Force Office of Scientific Research (United States)
Yalin Lu, Univ. of Colorado at Colorado Springs (United States)
Shaochen Chen, Univ. of California, San Diego (United States)

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