Electropolymerization of a poly(3,4-ethylenedioxythiophene) and functionalized, multi-walled, carbon nanotubes counter electrode for dye-sensitized solar cells and characterization of its performance |
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Authors: | Jun Zhang Xiaoxue Li Wei Guo Tubshin Hreid Jinfeng Hou Haiquan Su Zhuobin Yuan |
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Affiliation: | aSchool of Chemistry and Chemical Engineering, Inner Mongolia University, 235 West University Road, Hohhot 010021, PR China;bCollege of Environmental and Resource Sciences, Inner Mongolia University, 235 West University Road, Hohhot 010021, PR China;cTest Center, Inner Mongolia University of Technology, 49 Aimin Street, Xincheng District, Hohhot 010051, PR China;dCollege of Chemistry and Chemical Engineering, Graduate University of the Chinese Academy of Sciences, 19(A) Yuquan Road, Beijing 100049, PR China |
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Abstract: | Composite films of poly(3,4-ethylenedioxythiophene) and functionalized, multi-walled, carbon nanotubes (PEDOT–MWCNT) were fabricated by a simple oxidative electropolymerization method. These films were formed on fluorine-doped, tin oxide, glass substrates as counter electrodes (CEs) of platinum-free, dye-sensitized solar cells (DSSCs). The surface morphology, formation mechanism and electrochemical nature of PEDOT–MWCNT films were investigated using scanning electron microscopy (SEM), atomic force microscopy (AFM), cyclic voltammetry (CV) and alternating current (AC) impedance spectroscopy. The SEM and AFM images showed that PEDOT–MWCNT films were more porous than PEDOT films. CV and AC impedance spectroscopy revealed that the PEDOT–MWCNT electrode had higher electrocatalytic activity for the I3−/I− redox reaction and a smaller charge transfer resistance than the PEDOT electrodes. The energy conversion efficiency of the DSSC with a PEDOT–MWCNT CE was 13.0% higher than with a PEDOT CE using the same conditions with a ruthenium sensitizer. |
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Keywords: | Nanostructured PEDOT Carbon nanotubes Electropolymerization Counter electrode Dye-sensitized solar cell |
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