A quantum dot sensitized solar cell based on vertically aligned carbon nanotube templated ZnO arrays

J. Chen, C. Li, D. W. Zhao, Wei Lei, Y. Zhang, Matthew Cole, D. P. Chu, B. P. Wang, Y. P. Cui, X. W. Sun, W I Milne

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Abstract

We report on a quantum dot sensitized solar cell (QDSSC) based on ZnO nanorod coated vertically aligned carbon nanotubes (VACNTs). Electrochemical impedance spectroscopy shows that the electron lifetime for the device based on VACNT/ZnO/CdSe is longer than that for a device based on ZnO/CdSe, indicating that the charge recombination at the interface is reduced by the presence of the VACNTs. Due to the increased surface area and longer electron lifetime, a power conversion efficiency of 1.46% is achieved for the VACNT/ZnO/CdSe devices under an illumination of one Sun (AM 1.5G, 100 mW/cm2).

Original languageEnglish
Pages (from-to)1432-1435
Number of pages4
JournalElectrochemistry Communications
Volume12
Issue number10
DOIs
Publication statusPublished - Oct 2010

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Keywords

  • CdSe
  • Quantum dot
  • Solar cell
  • VACNT
  • ZnO

ASJC Scopus subject areas

  • Electrochemistry

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