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Ag Nanoparticle–Functionalized Open-Ended Freestanding TiO2 Nanotube Arrays with a Scattering Layer for Improved Energy Conversion Efficiency in Dye-Sensitized Solar Cells

1
Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea
2
Department of Chemistry, Seoul National University, Seoul 151-747, Korea
*
Author to whom correspondence should be addressed.
These authors contribute equally to this work.
Academic Editors: Guanying Chen, Zhijun Ning and Hans Agren
Nanomaterials 2016, 6(6), 117; https://doi.org/10.3390/nano6060117
Received: 30 March 2016 / Revised: 1 June 2016 / Accepted: 6 June 2016 / Published: 15 June 2016
(This article belongs to the Special Issue Nanostructured Solar Cells)
Dye-sensitized solar cells (DSSCs) were fabricated using open-ended freestanding TiO2 nanotube arrays functionalized with Ag nanoparticles (NPs) in the channel to create a plasmonic effect, and then coated with large TiO2 NPs to create a scattering effect in order to improve energy conversion efficiency. Compared to closed-ended freestanding TiO2 nanotube array–based DSSCs without Ag or large TiO2 NPs, the energy conversion efficiency of closed-ended DSSCs improved by 9.21% (actual efficiency, from 5.86% to 6.40%) with Ag NPs, 6.48% (actual efficiency, from 5.86% to 6.24%) with TiO2 NPs, and 14.50% (actual efficiency, from 5.86% to 6.71%) with both Ag NPs and TiO2 NPs. By introducing Ag NPs and/or large TiO2 NPs to open-ended freestanding TiO2 nanotube array–based DSSCs, the energy conversion efficiency was improved by 9.15% (actual efficiency, from 6.12% to 6.68%) with Ag NPs and 8.17% (actual efficiency, from 6.12% to 6.62%) with TiO2 NPs, and by 15.20% (actual efficiency, from 6.12% to 7.05%) with both Ag NPs and TiO2 NPs. Moreover, compared to closed-ended freestanding TiO2 nanotube arrays, the energy conversion efficiency of open-ended freestanding TiO2 nanotube arrays increased from 6.71% to 7.05%. We demonstrate that each component—Ag NPs, TiO2 NPs, and open-ended freestanding TiO2 nanotube arrays—enhanced the energy conversion efficiency, and the use of a combination of all components in DSSCs resulted in the highest energy conversion efficiency. View Full-Text
Keywords: open-ended freestanding TiO2 nanotube arrays; dye-sensitized solar cells; plasmonic; scattering; anodization open-ended freestanding TiO2 nanotube arrays; dye-sensitized solar cells; plasmonic; scattering; anodization
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MDPI and ACS Style

Rho, W.-Y.; Chun, M.-H.; Kim, H.-S.; Kim, H.-M.; Suh, J.S.; Jun, B.-H. Ag Nanoparticle–Functionalized Open-Ended Freestanding TiO2 Nanotube Arrays with a Scattering Layer for Improved Energy Conversion Efficiency in Dye-Sensitized Solar Cells. Nanomaterials 2016, 6, 117. https://doi.org/10.3390/nano6060117

AMA Style

Rho W-Y, Chun M-H, Kim H-S, Kim H-M, Suh JS, Jun B-H. Ag Nanoparticle–Functionalized Open-Ended Freestanding TiO2 Nanotube Arrays with a Scattering Layer for Improved Energy Conversion Efficiency in Dye-Sensitized Solar Cells. Nanomaterials. 2016; 6(6):117. https://doi.org/10.3390/nano6060117

Chicago/Turabian Style

Rho, Won-Yeop; Chun, Myeung-Hwan; Kim, Ho-Sub; Kim, Hyung-Mo; Suh, Jung S.; Jun, Bong-Hyun. 2016. "Ag Nanoparticle–Functionalized Open-Ended Freestanding TiO2 Nanotube Arrays with a Scattering Layer for Improved Energy Conversion Efficiency in Dye-Sensitized Solar Cells" Nanomaterials 6, no. 6: 117. https://doi.org/10.3390/nano6060117

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