Journal
JOURNAL OF MATERIALS SCIENCE
Volume 50, Issue 5, Pages 2148-2157Publisher
SPRINGER
DOI: 10.1007/s10853-014-8777-z
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Funding
- Ph.D. Programs Foundation of Ministry of Education of China [20114208110004]
- National Natural Science Foundation of China [51102087, 21402045]
- Program for Middle-aged and Young Talents from Educational Commission of Hubei Province [Q20120103]
- Natural Science Foundation of Hubei Province of China [2014CFB167]
- Wuhan Science and Technology Bureau of Hubei Province of China [2013010501010140]
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Preparation of graphene composite material suitable for drop-coating on FTO conductive glasses in ambient conditions is reported. Highly dispersed PEDOT:PSS/graphene composites were synthesized by in situ polymerization of 3,4-ethylenedioxythiophene (EDOT) using aqueous graphene dispersions as a precursor without the need for further reducing steps. The structural properties of the PEDOT:PSS/graphene were investigated by transmission electron microscope and FT-IR spectrometry. Graphene sheets as the support material likely provided increased active sites for the polymerization of EDOT. The graphene sheets were homogeneously coated by PEDOT:PSS. Drop-coating the solution of PEDOT:PSS/graphene nanocomposites onto FTO glass yielded graphene composite counter electrodes (CEs) useful for dye-sensitized solar cells (DSSCs). Both in cyclic voltammetry measurements and electrochemical impedance spectroscopy, the composite CEs exhibited good catalytic activity. The DSSCs based on PEDOT:PSS/graphene CEs showed a conversion efficiency of 4.66 %, comparable to platinum CE-based cells which showed a conversion efficiency of 5.94 %.
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