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We examined numerically the contribution of contrasting characteristics of metal nanoparticles, strong polarization and metallic loss, to the total efficiency of photovoltaic cells. A layer of nanoparticle array was chosen as a model. We found that depending on the location of the layer in the cell, the metallic loss offsets the enhanced photoabsorption due to the strong near field. A general procedure to reduce a nanoparticle layer into a sheet of effective continuous medium is presented, which greatly facilitates the quantitative analysis.
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Watanabe et al. (2011) studied this question.
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