Dye-sensitized solar cells using ZnO nanotips and Ga-doped ZnO films

Hanhong Chen, Aurelien Du Pasquier, Gaurav Saraf, Jian Zhong, Yicheng Lu

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97 Scopus citations

Abstract

Ga-doped ZnO (GZO) transparent conducting films and well-aligned ZnO nanotips were sequentially grown on a glass substrate using metal-organic chemical vapor deposition (MOCVD). The morphology control of ZnO from dense films to nanotips was realized through temperature-modulated growth. The ZnO nanotips/GZO structure was sensitized with dye N719 to form photoelectrochemical cells. It is found that the power conversion efficiency linearly increases with the length of ZnO nanotips. For the 1.0 cm2 dye-sensitized solar cell built from 4.8 νm ZnO nanotips, a peak incident photo-to-current conversion efficiency of 79% (at ∼530 nm) and a power conversion efficiency of 0.77% under the illumination of one sun-simulated sunlight were achieved. UV light harvesting directly by ZnO was observed. The I-V characteristics of the cells were analyzed using a one-diode equivalent circuit model.

Original languageEnglish (US)
Article number045004
JournalSemiconductor Science and Technology
Volume23
Issue number4
DOIs
StatePublished - Apr 1 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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