Ding, B and Lee, BJ and Yang, M and Jung, HS and Lee, JK
(2011)
Surface-plasmon assisted energy conversion in dye-sensitized solar cells.
Advanced Energy Materials, 1 (3).
415 - 421.
ISSN 1614-6832
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Abstract
In this study, the effect of plasmonic core-shell structures, consisting of dielectric cores and metallic nanoshells, on energy conversion in dye-sensitized solar cells (DSSCs) is investigated. The structure of the core-shell particles is controlled to couple with visible light so that the visible component of the solar spectrum is amplified near the core-shell particles. In core-shell particle-TiO 2 nanoparticle films, the local field intensity and light pathways are increased due to the surface plasmons and light scattering. This, in turn, enlarges the optical cross-section of dye sensitizers coated onto the mixed films. When 22 vol% of core-shell particles are added to a 5 μ m thick TiO 2 film, the energy conversion efficiency of DSSCs increases from 2.7% to 4.0%, in spite of a more than 20% decrease in the amount of dyes adsorbed on the composite films. The correaltion between core-shell particle content and energy conversion efficiency in DSSCs is explained by the balance among near-field effects, light scattering efficiency, and surface area in the composite films. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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