CoS acicular nanorod arrays for the counter electrode of an efficient dye-sensitized solar cell

Chung Wei Kung, Hsin Wei Chen, Chia Yu Lin, Kuan Chieh Huang, R. Vittal, Kuo Chuan Ho

研究成果: Article同行評審

303 引文 斯高帕斯(Scopus)

摘要

One-dimensional cobalt sulfide (CoS) acicular nanorod arrays (ANRAs) were obtained on a fluorine-doped tin oxide (FTO) substrate by a two-step approach. First, Co 3O 4 ANRAs were synthesized, and then they were converted to CoS ANRAs for various periods. The compositions of the films obtained after various conversion periods were verified by X-ray diffraction, UV-visible spectrophotometry, and X-ray photoelectron spectroscopy; their morphologies were examined at different periods by scanning electron microscopic and transmission electron microscopic images. Electrocatalytic abilities of the films toward I -/I 3 - were verified through cyclic voltammetry (CV) and Tafel polarization curves. Long-term stability of the films in I -/I 3 - electrolyte was studied by CV. The FTO substrates with CoS ANRAs were used as the counter electrodes for dye-sensitized solar cells; a maximum power conversion efficiency of 7.67% was achieved for a cell with CoS ANRAs, under 100 mW/cm 2, which is nearly the same as that of a cell with a sputtered Pt counter electrode (7.70%). Electrochemical impedance spectroscopy was used to substantiate the photovoltaic parameters.

原文English
頁(從 - 到)7016-7025
頁數10
期刊ACS Nano
6
發行號8
DOIs
出版狀態Published - 2012 八月 28

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 工程 (全部)
  • 物理與天文學 (全部)

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