Three dimensional-TiO2 nanotube array photoanode architectures assembled on a thin hollow nanofibrous backbone and their performance in quantum dot-sensitized solar cells

Hyungkyu Han; P. Sudhagar; Taeseup Song; Yeryung Jeon; Iván Mora-Seró; Francisco Fabregat-Santiago; Juan Bisquert; Yong Soo Kang; Ungyu Paik

doi:10.1039/C3CC40439K

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Chemical Communications

Issue 27, 2013

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Three dimensional-TiO₂ nanotube array photoanode architectures assembled on a thin hollow nanofibrous backbone and their performance in quantum dot-sensitized solar cells

Hyungkyu Han,^a P. Sudhagar,^b^c Taeseup Song,^a Yeryung Jeon,^b Iván Mora-Seró,^d Francisco Fabregat-Santiago,^d Juan Bisquert,^d Yong Soo Kang*^b^c and Ungyu Paik*^a^b

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Corresponding authors

Department of Materials Science & Engineering, Hanyang University, Seoul 133791, South Korea

World Class University Program Department of Energy Engineering, Hanyang University, Seoul 133791, South Korea
E-mail: upaik@hanyang.ac.kr

Center for Next Generation Dye-Sensitized Solar Cells, Hanyang University, Seoul 133791, South Korea
E-mail: kangys@hanyang.ac.kr

Photovoltaics and Optoelectronic Devices Group, Departament de Física Universitat Jaume I, Spain

Chem. Commun., 2013,49, 2810-2812

DOI: 10.1039/C3CC40439K
Received 18 Jan 2013, Accepted 15 Feb 2013
First published online 18 Feb 2013

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Facile synthesis of TiO₂ nanotube branched (length [similar] 0.5 μm) thin hollow-nanofibers is reported. The hierarchical three dimensional photoanodes (H-TiO₂-NFs) (only 1 μm thick) demonstrate their excellent candidature as photoanodes in QD-sensitized solar cells, exhibiting 3-fold higher energy conversion efficiency (η = 2.8%, J_sc = 8.8 mA cm⁻²) than that of the directly grown nanotube arrays on a transparent conducting oxide (TCO) substrate (η = 0.9%, J_sc = 2.5 mA cm⁻²).