Transmittance optimized nb-doped TiO2/Sn-doped In 2O3 multilayered photoelectrodes for dye-sensitized solar cells

Dong Hoe Kim, Sangwook Lee, Jong Hoon Park, Jun Hong Noh, Ik Jae Park, Won Mo Seong, Kug Sun Hong

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

We adopt a compact TiO2 (c-TiO2) layer on Nb-doped TiO2 (NTO)/Sn-doped indium oxide (ITO) multilayered electrodes, which are transparent conducting oxide (TCO) electrodes, to improve their transmittance for high-efficiency dye-sensitized solar cells (DSSCs). An NTO layer was deposited on ITO by pulsed laser deposition (PLD) and then a c-TiO2 layer was deposited on the NTO/ITO multilayer by spin-coating a sol. The transmittance spectrum of the c-TiO2/NTO/ITO multilayered photoelectrodes varied with the thickness of TiO2. The short circuit current and energy conversion efficiency of the photoelectrodes also varied with the thickness of the c-TiO2 layer, which is similar behavior to the integrated value of the transmittance in the wavelength range from 500 to 600 nm. Finally, the DSSC employing the 160 nm-thick c-TiO2 layer exhibited the most improved energy conversion efficiency, compared to the DSSC without the c-TiO2 layer. Our results demonstrate that the unfavorable optical properties of TCO, e.g. NTO, for DSSCs can be enhanced by the formation of an additional thin layer, e.g. c-TiO2.

Original languageEnglish
Pages (from-to)276-280
Number of pages5
JournalSolar Energy Materials and Solar Cells
Volume96
Issue number1
DOIs
Publication statusPublished - 2012 Jan
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the World Class University (WCU) program through the Korea Science and Engineering Foundation funded by the ministry of Education, Science and technology (R31-2008-000–10075-0). And characterization of the crystal structure was supported by Research Institute of Advanced Materials (RIAM).

Keywords

  • Compact TiO layer
  • Dye-sensitized solar cells (DSSCs)
  • Optical modulation
  • Transparent conducting oxides (TCO)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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