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|標題:||Platinum nanoparticle/self-doping polyaniline compositebasedcounter electrodes for dye-sensitized solar cells|
|關鍵字:||Dye-sensitized solar cell|
|摘要:||In this study, we developed a series ofplatinum nanoparticle (PtNP)/self-doping polyaniline(SPANI) composite-based counter electrodes fordye-sensitized solar cells (DSSCs). The SPANIs withnanospherical (S-SPANI) and nanotube (T-SPANI)structures were respectively self-assembled on theindium–tin oxide glass substrate via the in situ oxidationpolymerization. The S-SPANI and T-SPANIwere prepared by the copolymerization of self-dopingmonomer o-aminobenzenesulfonic acid and aniline indifferent molar ratios. The PtNP/SPANI compositebasedcounter electrodes were further preparedthrough the reduction of Pt ions on the SPANI layerusing reduction agents of formic acid and sodiumborohydride (NaBH4). The SPANI can serve as theproposed supports to disperse PtNPs. The particlessizes of formic acid-reduced nano-platinum (F-PtNPs;5–15 nm) were smaller than those of the NaBH4-reduced nano-platinum (S-PtNPs; 15–25 nm). Moreover,the distribution of F-PtNPs on the surface ofSPANIs was more uniform than that of the S-PtNPson the surface of SPANIs. The effects of SPANImorphology and PtNP size/distribution on the electrochemicalbehavior and photovoltaic performance ofthese PtNPs/SPANI counter electrodes-based DSSCswere studied. The highest short-circuit current density (14.87 mA cm-2), fill factor (64.2 %), and photoenergyconversion efficiency (4.77 %) were obtained forthe DSSC based on the F-PtNP/S-SPANI counterelectrode.|
|Appears in Collections:||化學工程學系所|
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