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  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper EH_9_6

Solar-vapor Generation with 69% Energy Conversion Efficiency in Hollow-mesoporous Plasmonic Nanoshells

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Harnessing solar energy at a high efficiency and a low cost remains challenging. The advent of nanotechnology enabled new solar-thermal techniques where plasmonic nanoparticles (NPs) in a volumetric dispersion are used to generate steam locally without a significant heat loss into the entire bulk, thereby alleviating the need for an extensive thermal insulation. Nanoparticle-assisted solar-vapor generation was recently demonstrated using SiO2/Au core/shell NPs at 1000× solar irradiance at air mass (AM) 1.5, showing an energy conversion efficiency of 24% [1]. Here, we achieve solar-vapor generation at 69% efficiency at 10× AM 1.5 by combining plasmonics with mesoporous thermal cavities, exploiting the extended active surface and nearly neutral buoyancy [Fig. 1(a)].

© 2017 IEEE

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