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- W2176355207 abstract "Polypyrrole-coated multi-walled carbon nanotubes (PPy/MWCNT) were synthesized using a three-step chemical oxidative polymerization and were simply deposited by an ex situ method from n-butyl alcohol dispersions onto conducting FTO glasses to be used as a low-cost replacement for Pt counter electrodes (CE) in dye-sensitized solar cells (DSSCs). PPy/MWCNT CEs, compared to PPy CEs, have significantly higher interlayer cohesion and adhesion to the FTO substrate, which increases with the MWCNT ratio. The network structure of PPy/MWCNT CEs, with a larger surface area compared to PPy CEs (characterized by SEM), has a positive effect on the charge transfer resistance (Rct), and the PPy/MWCNT CE sample with a ratio of 70:30 reaches a lower Rct than the standard Pt CE, as measured by electrochemical impedance spectroscopy. PPy/MWCNT CEs have reasonable catalytic activities and good stability in the presence of an iodide/triiodide electrolyte, as measured by cyclic voltammetry. The conversion efficiency of the DSSC with PPy/MWCNT (70:30) CEs reaches a ∼10× higher value (η = 4.9%) than the DSSC with pristine PPy CEs (η = 0.5%) and a ∼30% lower value than the standard DSSC with Pt CEs (η = 7.1%)." @default.
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- W2176355207 date "2015-12-01" @default.
- W2176355207 modified "2023-10-15" @default.
- W2176355207 title "Polypyrrole-coated multi-walled carbon nanotubes for the simple preparation of counter electrodes in dye-sensitized solar cells" @default.
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- W2176355207 doi "https://doi.org/10.1016/j.synthmet.2015.10.020" @default.
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