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Appl. Sci. 2017, 7(6), 576; doi:10.3390/app7060576

Dual Functionalized Freestanding TiO2 Nanotube Arrays Coated with Ag Nanoparticles and Carbon Materials for Dye-Sensitized Solar Cells

1
Department of Chemistry, Seoul National University, Seoul 151-747, Korea
2
Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Academic Editors: Elias K. Stefanakos and Sesha S. Srinivasan
Received: 21 March 2017 / Revised: 21 May 2017 / Accepted: 30 May 2017 / Published: 2 June 2017
(This article belongs to the Special Issue Clean Energy and Fuel (Hydrogen) Storage)
View Full-Text   |   Download PDF [2433 KB, uploaded 5 June 2017]   |  

Abstract

Highly ordered, freestanding TiO2 nanotube arrays (TiO2 NTAs) were prepared using an electrochemical method. The barrier layer was etched to open the bottom of each array, aptly named “open-ended TiO2 NTAs”. These arrays were coated with silver nanoparticles (Ag NPs) and/or carbon materials to enhance electron generation and transport. The energy conversion efficiency of the resulting dye-sensitized solar cells (DSSCs) with open-ended freestanding TiO2 NTAs, when coated with Ag NPs, increased from 5.32% to 6.14% (by 15%) due to plasmonic interactions. Meanwhile, coating the open-ended freestanding TiO2 NTAs with carbon materials increased the energy conversion efficiency from 5.32% to 6.07% (by 14%), due to π-π conjugation. When the Ag NPs and carbon materials were simultaneously applied to the open-ended freestanding TiO2 NTAs, the energy conversion efficiency increased from 5.32% to 6.91%—an enhancement of 30%, due to the additive effects of plasmonics and π-π conjugation. View Full-Text
Keywords: dye-sensitized solar cells; carbon materials; Ag nanoparticles; freestanding TiO2 nanotube arrays dye-sensitized solar cells; carbon materials; Ag nanoparticles; freestanding TiO2 nanotube arrays
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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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Kim, H.-S.; Chun, M.-H.; Suh, J.S.; Jun, B.-H.; Rho, W.-Y. Dual Functionalized Freestanding TiO2 Nanotube Arrays Coated with Ag Nanoparticles and Carbon Materials for Dye-Sensitized Solar Cells. Appl. Sci. 2017, 7, 576.

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