Nitrogen-Doped Graphene/Platinum Counter Electrodes for Dye-Sensitized Solar Cells

Chinan Lin, Chuanpei Lee, Shute Ho, Tzuchiao Wei, Yuwen Chi, Kunping Huang, Jr-Hau He

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Nitrogen-doped graphene (NGR) was utilized in dye-sensitized solar cells for energy harvesting. NGR on a Pt-sputtered fluorine-doped tin oxide substrate (NGR/Pt/FTO) as counter electrodes (CEs) achieves the high efficiency of 9.38% via the nitrogen doping into graphene. This is due to (i) the hole-cascading transport at the interface of electrolyte/CEs via controlling the valence band maximum of NGR located between the redox potential of the I-/I- redox couple and the Fermi level of Pt by nitrogen doping, (ii) the extended electron transfer surface effect provided by large-surface-area NGR, (iii) the high charge transfer efficiency due to superior catalytic characteristics of NGR via nitrogen doping, and (iv) the superior light-reflection effect of NGR/Pt/FTO CEs, facilitating the electron transfer from CEs to I3 - ions of the electrolyte and light absorption of dye. The result demonstrated that the NGR/Pt hybrid structure is promising in the catalysis field. (Chemical Presented). © 2014 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)1264-1269
Number of pages6
JournalACS Photonics
Volume1
Issue number12
DOIs
StatePublished - Nov 24 2014

ASJC Scopus subject areas

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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