Surface modified TiO 2 nanostructure with 3d urchin-like morphology for dye-sensitized solar cell application

Seong Sik Shin, Dong Wook Kim, Sangwook Lee, In Sun Cho, Dong Hoe Kim, Jong Hoon Park, Kug Sun Hong

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Three-dimensional (3D) urchin-like rutile TiO 2 powders were synthesized by a mild hydrothermal method without any templates. An individual urchin-like TiO 2 powder consists of self-assembled nanorods with a length of about 150 nm and width of about 10 nm. Additionally, the urchin-like TiO 2 nanopowders were coated with an ultra-thin ZnO layer in order to modify the surface properties of the nanopowders, and the ZnO layer was confirmed by high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) analysis. The ZnO-modified TiO 2 was used as a photoelectrode of a dye-sensitized solar cell (DSSC) and the solar cell performances were investigated. In comparison with bare TiO 2, ZnO-modified TiO 2 improved the photovoltaic performances, i.e., energy conversion efficiency, open circuit voltage, and short circuit current were increased. The higher DSSC performance of ZnO-modified TiO 2 was attributed to its higher dye loading and lower charge recombination rate.

Original languageEnglish
Pages (from-to)1305-1309
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number2
DOIs
Publication statusPublished - 2012
Externally publishedYes

Keywords

  • Dye-sensitized solar cell
  • Rutile TiO
  • Surface modification
  • Three-dimensional
  • ZnO

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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