Issue 3, 2012

Dye-sensitized solar cells based on a nanoparticle/nanotube bilayer structure and their equivalent circuit analysis

Abstract

Dye-sensitized solar cells (DSSCs) were prepared by capitalizing on a TiO2 bilayer structure composed of P-25 nanoparticles and freestanding crystalline nanotube arrays as photoanodes. After being subjected to sequential TiCl4 treatment and O2 plasma exposure, the bilayer photoanode was sensitized with N719 dye. DSSCs based on a 20 μm TiO2 nanoparticle film solely and a bilayer of 13 μm TiO2 nanoparticles and 7 μm TiO2 nanotubes exhibited the highest power conversion efficiency, PCE, of 8.02% and 7.00%, respectively, compared to the devices made of different TiO2 thicknesses. On the basis of JV parameter analysis acquired by equivalent circuit model simulation, in comparison to P-25 nanoparticles, charge transport in nanotubes was found to be facilitated due to the presence of advantageous nanotubular structures, while photocurrent was reduced owing to their small surface area, which in turn resulted in low dye loading, as well as the lack of cooperative effect of anatase and rutile phases.

Graphical abstract: Dye-sensitized solar cells based on a nanoparticle/nanotube bilayer structure and their equivalent circuit analysis

Supplementary files

Article information

Article type
Paper
Submitted
30 Oct 2011
Accepted
01 Dec 2011
First published
21 Dec 2011

Nanoscale, 2012,4, 964-969

Dye-sensitized solar cells based on a nanoparticle/nanotube bilayer structure and their equivalent circuit analysis

X. Xin, J. Wang, W. Han, M. Ye and Z. Lin, Nanoscale, 2012, 4, 964 DOI: 10.1039/C2NR11617K

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