Open-ended TiO2 nanotubes formed by two-step anodization and their application in dye-sensitized solar cells

Nanoscale. 2012 Jan 21;4(2):448-50. doi: 10.1039/c2nr11317a. Epub 2011 Dec 12.

Abstract

We demonstrate a simple method to fabricate open-ended TiO(2) nanotube (NT) based dye-sensitized solar cells (DSSCs), where the NTs are attached to either TiO(2) nanorods (NRs) grown on fluorine-doped tin oxide (FTO) or FTO directly by nanoparticles (NPs). A completely hole-through TiO(2) NT layer is fabricated via a two-step anodization with heat treatment immediately after the first anodization. DSSCs with the open-ended NTs show better photovoltaic performance than those with close-ended NTs, due to the enhanced charge transport in the open-ended structure. Under optimum conditions, DSSCs fabricated with the open-ended NT layer exhibit a short circuit current density (J(sc)) of 19.10 mA cm(-2), an open circuit voltage (V(oc)) of 0.68 V, a fill factor (FF) of 0.49, and a power conversion efficiency (eff) of 6.3%.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Coloring Agents / chemistry*
  • Electric Power Supplies*
  • Equipment Design
  • Equipment Failure Analysis
  • Nanotechnology / instrumentation*
  • Nanotubes / chemistry*
  • Nanotubes / ultrastructure*
  • Particle Size
  • Solar Energy*
  • Titanium / chemistry*

Substances

  • Coloring Agents
  • titanium dioxide
  • Titanium