Title: An optimized surface plasmon photovoltaic structure using energy transfer between discrete nano-particles
Authors: Lin, Albert
Fu, Sze-Ming
Chung, Yen-Kai
Lai, Shih-yun
Tseng, Chi-Wei
Department of Electrophysics
Department of Electronics Engineering and Institute of Electronics
Issue Date: 14-Jan-2013
Abstract: Surface plasmon enhancement has been proposed as a way to achieve higher absorption for thin-film photovoltaics, where surface plasmon polariton(SPP) and localized surface plasmon (LSP) are shown to provide dense near field and far field light scattering. Here it is shown that controlled far-field light scattering can be achieved using successive coupling between surface plasmonic (SP) nano-particles. Through genetic algorithm (GA) optimization, energy transfer between discrete nano-particles (ETDNP) is identified, which enhances solar cell efficiency. The optimized energy transfer structure acts like lumped-element transmission line and can properly alter the direction of photon flow. Increased in-plane component of wavevector is thus achieved and photon path length is extended. In addition, Wood-Rayleigh anomaly, at which transmission minimum occurs, is avoided through GA optimization. Optimized energy transfer structure provides 46.95% improvement over baseline planar cell. It achieves larger angular scattering capability compared to conventional surface plasmon polariton back reflector structure and index-guided structure due to SP energy transfer through mode coupling. Via SP mediated energy transfer, an alternative way to control the light flow inside thin- film is proposed, which can be more efficient than conventional index-guided mode using total internal reflection (TIR). (C)2012 Optical Society of America
URI: http://hdl.handle.net/11536/21465
ISSN: 1094-4087
Volume: 21
Issue: 1
Begin Page: A131
End Page: A145
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