Orientation-Controllable ZnO Nanorod Array Using Imprinting Method for Maximum Light Utilization in Dye-Sensitized Solar Cells

Huisu Jeong, Hui Song, Ryeri Lee, Yusin Pak, Yogeenth Kumaresan, Heon Lee, Gun Young Jung

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We present a holey titanium dioxide (TiO<inf>2</inf>) film combined with a periodically aligned ZnO nanorod layer (ZNL) for maximum light utilization in dye-sensitized solar cells (DSCs). Both the holey TiO<inf>2</inf> film and the ZNL were simultaneously fabricated by imprint technique with a mold having vertically aligned ZnO nanorod (NR) array, which was transferred to the TiO<inf>2</inf> film after imprinting. The orientation of the transferred ZNL such as laid, tilted, and standing ZnO NRs was dependent on the pitch and height of the ZnO NRs of the mold. The photoanode composed of the holey TiO<inf>2</inf> film with the ZNL synergistically utilized the sunlight due to enhanced light scattering and absorption. The best power conversion efficiency of 8.5 % was achieved from the DSC with the standing ZNL, which represented a 33 % improvement compared to the reference cell with a planar TiO<inf>2</inf>.

Original languageEnglish
Article number263
JournalNanoscale Research Letters
Volume10
Issue number1
DOIs
Publication statusPublished - 2015 Dec 20

Keywords

  • Dye-sensitized solar cell
  • Light harvesting
  • Scattering layer
  • TiO<inf>2</inf> patterning
  • ZnO nanorods

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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