Synthesis of cose2/rgo composites and its application as a counter electrode for dye-sensitized solar cells

Yohan Ko, Wooyeol Choi, Youbin Kim, Chanyong Lee, Yongseok Jun, Junhee Kim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


In this study, cobalt diselenide (CoSe2) and the composites (CoSe2@RGO) of CoSe2 and reduced graphene oxide (RGO) were synthesized by a facile hydrothermal reaction using cobalt ions and selenide source with or without graphene oxide (GO). The formation of CoSe2@RGO composites was identified by analysis with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and scanning electron microscopy (SEM). Electrochemical analyses demonstrated that the CoSe2@RGO composites have excellent catalytic activity for the reduction of I3-, possibly indicating a synergetic effect of CoSe2 and RGO. As a consequence, the CoSe2@RGO composites were applied as a counter electrode in DSSC for the reduction of redox couple electrolyte, and exhibiting the comparable power conversion efficiency (7.01%) to the rare metal platinum (Pt) based photovoltaic device (6.77%).

Original languageEnglish
Pages (from-to)313-320
Number of pages8
JournalJournal of Electrochemical Science and Technology
Issue number3
Publication statusPublished - 2019 Sep


  • Alternative Catalyst
  • CoSe
  • Counter Electrode
  • DSSCs
  • Metal Chalcogenide

ASJC Scopus subject areas

  • Electrochemistry


Dive into the research topics of 'Synthesis of cose<sub>2</sub>/rgo composites and its application as a counter electrode for dye-sensitized solar cells'. Together they form a unique fingerprint.

Cite this