Enhanced electrocatalytic activity of plasma functionalized multi-walled carbon nanotube-entrapped poly(3,4-ethylendioxythiophene): poly(styrene sulfonate) photocathode

Yong Hoon Rhee, Dong June Ahn, Min Jae Ko, Hwa Young Jin, Joon Hyung Jin, Nam Ki Min

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A composite of poly(3,4-ethylendioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and multi-walled carbon nanotubes (MWNTs) was electrochemically polymerized on a fluorine-doped tin oxide (FTO) substrate and used as a photocathode for a dye-sensitized solar cell. The MWNTs were previously O2 plasma treated and simultaneously entrapped while the PEDOT:PSS film was electropolymerized. The resulting plasma-functionalized MWNT-entrapped PEDOT:PSS composite showed enhanced electrocatalytic activity for the reduction of I3 - to I-, this was confirmed by scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and incident photon-to-current conversion efficiency (IPCE) measurements. An improved energy conversion efficiency by about 13.9% was observed in optimized conditions as compared to a platinized FTO-based photocathode.

Original languageEnglish
Pages (from-to)68-72
Number of pages5
JournalElectrochimica Acta
Publication statusPublished - 2014 Nov 10


ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

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