Journal
CHEMICAL PAPERS
Volume 72, Issue 7, Pages 1651-1667Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s11696-018-0476-9
Keywords
Dye-sensitized solar cell; Counter electrode; Polypyrrole; Multi-walled carbon nanotubes; Electrochemical deposition
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Funding
- Slovak Grant Agency [VEGA 1/0900/16, VEGA 2/0010/18]
- project SAS-TUBITAK [JRP 2014/2]
- project KONNECT
- COST project [MP 1307]
- STU Grant
- project Korea V4 PLL
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In this work, multi-wall carbon nanotubes coated with polypyrrole (PPy/MWCNT) have been used as counter electrode (CE) materials for dye-sensitized solar cells (DSSCs). PPy was deposited onto fluorine-doped tin-oxide-coated glass by electrochemical polymerization of pyrrole. Three surfactants were used in the preparation of the hybrids: cationic cetyltrimethylammonium bromide, anionic sodium dodecylbenzenesulfonate (DBSNa), and non-ionic polyoxyethylene sorbitan monolaurate (Tween20). The morphologies of the PPy and PPy/MWCNT hybrids were investigated using scanning electron spectroscopy. Chemical composition of the prepared CEs was determined by X-ray photoelectron spectroscopy and Fourier-transformed infrared spectroscopy. The catalytic activity of the PPy and PPy/MWCNT layers was evaluated using cyclic voltammetry, and the photovoltaic properties of DSSCs with PPy and PPy/MWCNT CEs were characterized using I-V measurements. PPy/MWCNT samples that were prepared by electrochemical polymerization showed the best results when the anionic surfactant DBSNa was used during polymerization. The photoelectric conversion efficiency of PPy/MWCNT prepared by electrochemical polymerization was 2.9%, which was 59% of that of Pt CE (4.9%).
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