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Open AccessArticle

Au-Embedded and Carbon-Doped Freestanding TiO2 Nanotube Arrays in Dye-Sensitized Solar Cells for Better Energy Conversion Efficiency

1
School of International Engineering and Science, Jeonbuk National University, Jeonju 54896, Korea
2
Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(12), 805; https://doi.org/10.3390/mi10120805
Received: 25 October 2019 / Revised: 13 November 2019 / Accepted: 19 November 2019 / Published: 22 November 2019
(This article belongs to the Special Issue Nanostructured Photovoltaic Devices)
Dye-sensitized solar cells (DSSCs) are fabricated with freestanding TiO2 nanotube arrays (TNTAs) which are incorporated with Au nanoparticles (NPs) and carbon materials via electrodeposition and chemical vapor deposition (CVD) method to create a plasmonic effect and better electron transport that will enhance their energy conversion efficiency (ECE). The ECE of DSSCs based on the freestanding TNTAs is 5.87%. The ECE of DSSCs, based on the freestanding TNTAs with Au NPs or carbon materials, is 6.57% or 6.59%, respectively, and the final results of DSSCs according to the freestanding TNTAs with Au NPs and carbon materials is increased from 5.87% to 7.24%, which is an enhancement of 23.34% owing to plasmonic effect and better electron transport. Au NPs are incorporated into the channel of freestanding TNTAs and are characterized by CS-corrected-field emission transmission electron microscope (Cs-FE-TEM) and elemental mapping. Carbon materials are also well-incorporated in the channel of freestanding TNTAs and are analyzed by Raman spectroscopy. View Full-Text
Keywords: dye-sensitized solar cell; freestanding TiO2 nanotube arrays; Au nanoparticles; plasmon; carbon materials dye-sensitized solar cell; freestanding TiO2 nanotube arrays; Au nanoparticles; plasmon; carbon materials
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MDPI and ACS Style

Rho, W.-Y.; Lee, K.-H.; Han, S.-H.; Kim, H.-Y.; Jun, B.-H. Au-Embedded and Carbon-Doped Freestanding TiO2 Nanotube Arrays in Dye-Sensitized Solar Cells for Better Energy Conversion Efficiency. Micromachines 2019, 10, 805.

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