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Nanomaterials 2017, 7(6), 136; doi:10.3390/nano7060136

Multi-Shaped Ag Nanoparticles in the Plasmonic Layer of Dye-Sensitized Solar Cells for Increased Power Conversion Efficiency

1
Department of Chemistry, Seoul National University, Seoul 151-747, Korea
2
Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea
*
Authors to whom correspondence should be addressed.
Received: 17 April 2017 / Revised: 30 May 2017 / Accepted: 2 June 2017 / Published: 4 June 2017
(This article belongs to the Special Issue Nanomaterials for Renewable and Sustainable Energy)
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Abstract

The use of dye-sensitized solar cells (DSSCs) is widespread owing to their high power conversion efficiency (PCE) and low cost of manufacturing. We prepared multi-shaped Ag nanoparticles (NPs) and introduced them into DSSCs to further enhance their PCE. The maximum absorption wavelength of the multi-shaped Ag NPs is 420 nm, including the shoulder with a full width at half maximum (FWHM) of 121 nm. This is a broad absorption wavelength compared to spherical Ag NPs, which have a maximum absorption wavelength of 400 nm without the shoulder of 61 nm FWHM. Therefore, when multi-shaped Ag NPs with a broader plasmon-enhanced absorption were coated on a mesoporous TiO2 layer on a layer-by-layer structure in DSSCs, the PCE increased from 8.44% to 10.22%, equivalent to an improvement of 21.09% compared to DSSCs without a plasmonic layer. To confirm the plasmon-enhanced effect on the composite film structure in DSSCs, the PCE of DSSCs based on the composite film structure with multi-shaped Ag NPs increased from 8.58% to 10.34%, equivalent to an improvement of 20.51% compared to DSSCs without a plasmonic layer. This concept can be applied to perovskite solar cells, hybrid solar cells, and other solar cells devices. View Full-Text
Keywords: Ag nanoparticle; dye-sensitized solar cell; plasmonic layer Ag nanoparticle; dye-sensitized solar cell; plasmonic layer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Song, D.H.; Kim, H.-S.; Suh, J.S.; Jun, B.-H.; Rho, W.-Y. Multi-Shaped Ag Nanoparticles in the Plasmonic Layer of Dye-Sensitized Solar Cells for Increased Power Conversion Efficiency. Nanomaterials 2017, 7, 136.

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