3-D TiO2 nanoparticle/ITO nanowire nanocomposite antenna for efficient charge collection in solid state dye-sensitized solar cells

Gill Sang Han; Sangwook Lee; Jun Hong Noh; Hyun Suk Chung; Jong Hoon Park; Bhabani Sankar Swain; Jeong-Hyeok Im; Nam-Gyu Park; Hyun Suk Jung

doi:10.1039/C4NR00621F

3-D TiO₂ nanoparticle/ITO nanowire nanocomposite antenna for efficient charge collection in solid state dye-sensitized solar cells†

Gill Sang Han,^a Sangwook Lee,^b Jun Hong Noh,^c Hyun Suk Chung,^a Jong Hoon Park,^d Bhabani Sankar Swain,^a Jeong-Hyeok Im,^e Nam-Gyu Park^e and Hyun Suk Jung*^a

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* Corresponding authors

^a School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, Korea
E-mail: hsjung1@skku.edu
Fax: +82-31-290-7410
Tel: +82-31-290-7403

^b Department of Material Science and Engineering, University of California at Berkeley, CA94709, USA

^c KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon, Korea

^d Department of Materials Science and Engineering, Seoul National University, Seoul, Korea

^e School of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon, Korea

Abstract

TiO₂ nanoparticle (NP)/ITO nanowire (NW) nanocomposites for use as photoelectrode materials were fabricated to improve the charge collection efficiency in solid state dye sensitized solar cells (ss-DSSCs). The average current density for ss-DSSCs containing TiO₂ NP/ITO NW arrays was 7.2 mA cm⁻² that was 98% higher than that for the conventional TiO₂ NP ss-DSSCs. The intensity modulated photocurrent spectroscopy (IMPS) and intensity modulated photovoltage spectroscopy (IMVS) studies exhibited that the electron diffusion length of TiO₂ NP/ITO-NW nanocomposite ss-DSSCs was in the range of 4.3–5.6 μm, longer than that of TiO₂ NP solar cells (2.6–4.1 μm). The longer diffusion length was responsible for the boosted current densities of TiO₂ NP/ITO NW nanocomposite ss-DSSCs. We also employed the TiO₂ NP/ITO NW nanocomposite photoelectrode to inorganic–organic perovskite solar cells whose energy conversion efficiency was 7.5%.

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Article information

DOI: https://doi.org/10.1039/C4NR00621F
Article type: Paper
Submitted: 03 Feb 2014
Accepted: 18 Mar 2014
First published: 21 Mar 2014

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Nanoscale, 2014,6, 6127-6132

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3-D TiO₂ nanoparticle/ITO nanowire nanocomposite antenna for efficient charge collection in solid state dye-sensitized solar cells

G. S. Han, S. Lee, J. H. Noh, H. S. Chung, J. H. Park, B. S. Swain, J. Im, N. Park and H. S. Jung, Nanoscale, 2014, 6, 6127 DOI: 10.1039/C4NR00621F

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