Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Photoelectrochemical Cell Study on Closely Arranged Vertical Nanorod Bundles of CdSe and Zn doped CdSe Films

  • Soundararajan, D. (Division of Applied Chemistry & Biotechnology, Hanbat National University) ;
  • Yoon, J.K. (Division of Applied Chemistry & Biotechnology, Hanbat National University) ;
  • Kwon, J.S. (Division of Applied Chemistry & Biotechnology, Hanbat National University) ;
  • Kim, Y.I. (Division of Applied Chemistry & Biotechnology, Hanbat National University) ;
  • Kim, S.H. (Division of Applied Chemistry & Biotechnology, Hanbat National University) ;
  • Park, J.H. (Division of Applied Chemistry & Biotechnology, Hanbat National University) ;
  • Kim, Y.J. (Division of Applied Chemistry & Biotechnology, Hanbat National University) ;
  • Park, D.Y. (Department of Applied Materials Engineering, Hanbat National University) ;
  • Kim, B.C. (ARC Centre of Excellence for Electromaterials Science and Intelligent Polymer Research Institute, University of Wollongong) ;
  • Wallac, G.G. (ARC Centre of Excellence for Electromaterials Science and Intelligent Polymer Research Institute, University of Wollongong) ;
  • Ko, J.M. (Division of Applied Chemistry & Biotechnology, Hanbat National University)
  • Received : 2010.04.13
  • Accepted : 2010.06.08
  • Published : 2010.08.20
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Abstract

Closely arranged CdSe and Zn doped CdSe vertical nanorod bundles were grown directly on FTO coated glass by using electrodeposition method. Structural analysis by XRD showed the hexagonal phase without any precipitates related to Zn. FE-SEM image showed end capped vertically aligned nanorods arranged closely. From the UV-vis transmittance spectra, band gap energy was found to vary between 1.94 and 1.98 eV due to the incorporation of Zn. Solar cell parameters were obtained by assembling photoelectrochemical cells using CdSe and CdSe:Zn photoanodes, Pt cathode and polysulfide (1M $Na_2S$ + 1M S + 1M NaOH) electrolyte. The efficiency was found to increase from 0.16 to 0.22 upon Zn doping. Electrochemical impedance spectra (EIS) indicate that the charge-transfer resistance on the FTO/CdSe/polysulfide interface was greater than on FTO/CdSe:Zn/polysulfide. Cyclic voltammetry results also indicate that the FTO/CdSe:Zn/polysulfide showed higher activity towards polysulfide redox reaction than that of FTO/CdSe/polysulfide.

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References

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