Journal
JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE
Volume 5, Issue 11, Pages 2096-2101Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jctn.2008.1103
Keywords
Surface Plasmon; Solar Photovoltaics; Silver Nanoparticle; Mie Scattering
Categories
Funding
- DOE [DE-FG02-02ER45977]
- MASDAR
- U.S. Department of Energy (DOE) [DE-FG02-02ER45977] Funding Source: U.S. Department of Energy (DOE)
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An extended Mie scattering theory is used in this paper to analyze the surface-plasmon enhanced light absorption in silicon for photovoltaic applications. The calculation results show that the optical absorption in silicon can be enhanced up to 50 times at resonance frequency by embedded spherical silver nanoparticles due to the local field enhancement by surface plasmons. The analysis reveals that the surface-plasmon field is concentrated in a spherical shell that encloses the particle. The enhancement reaches maximum when the thickness of the shell is 0.26 times the radius of the particle. The maximum absorption enhancement is found to be induced by silver particles with intermediate radii. The enhancement with larger particles is limited by the retardation effect, while the smaller-particle assisted absorption is hampered by electron scattering on the particle surface.
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