Anatase TiO(2) nanosheets with exposed (001) facets: improved photoelectric conversion efficiency in dye-sensitized solar cells

Nanoscale. 2010 Oct;2(10):2144-9. doi: 10.1039/c0nr00427h. Epub 2010 Sep 20.

Abstract

Dye-sensitized solar cells (DSSCs) are fabricated based on anatase TiO(2) nanosheets (TiO(2)-NSs) with exposed {001} facets, which were obtained by a simple one-pot hydrothermal route using HF as a morphology controlling agent and Ti(OC(4)H(9))(4) as precursor. The prepared samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis absorption spectroscopy and N(2) adsorption-desorption isotherms. The photoelectric conversion performances of TiO(2)-NSs solar cells are also compared with TiO(2) nanoparticles (TiO(2)-NPs) and commercial-grade Degussa P25 TiO(2) nanoparticle (P25) solar cells at the same film thickness, and their photoelectric conversion efficiencies (η) are 4.56, 4.24 and 3.64%, respectively. The enhanced performance of the TiO(2)-NS solar cell is due to their good crystallization, high pore volume, large particle size and enhanced light scattering. The prepared TiO(2) nanosheet film electrode should also find wide-ranging potential applications in various fields including photocatalysis, catalysis, electrochemistry, separation, purification and so on.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Coloring Agents / chemistry
  • Electrochemistry / methods
  • Light
  • Metal Nanoparticles / chemistry
  • Nanotechnology / methods*
  • Nitrogen / chemistry
  • Particle Size
  • Photochemistry / methods*
  • Scattering, Radiation
  • Solar Energy
  • Spectrophotometry, Ultraviolet / methods
  • Temperature
  • Titanium / chemistry*

Substances

  • Coloring Agents
  • titanium dioxide
  • Titanium
  • Nitrogen