International Journal of Electrochemical Science · 2011 · 12 citations · 33 references
Natural SciencesChemistryMaterials ScienceElectrochemistryElectronic MaterialsEnergy MaterialsElectrochemical CellsElectrode MaterialsPhotoelectrochemistryRedox-active MaterialsSolar Cell MaterialsSolar CellsAc Impedance AnalysisCell EfficiencyCharge Transfer MechanismsCharge Transfer ResistanceDye-sensitized Solar CellsElectrochemical Reaction MechanismsNanostructured ElectrodesVoltammetry
Nanostructured iodine films with control the thickness which from 0- to 100- sweep-segments successfully electrodeposited on PEDOT/ITO glass substrates using the cyclic voltammetry (CV) method at room temperature. The formation mechanism of the iodine-PEDOT film is monitored by CV techniques, UV-visible spectroscopy, alternating current (AC) impedance spectroscopy, scanning electron microscopy (SEM) and atomic force microscopy (AFM). CV and AC impedance spectroscopy reveal that the iodine-PEDOT CEs have higher electrocatalytic activity for the I3−/I− redox reaction and a smaller charge transfer resistance than the PEDOT electrodes. It is found that iodine-PEDOT increased the reactive interface, which supports charge transfer at the interface. With an optimum iodine film thickness of 50 sweep-segments on PEODT CEs, a 19.5% improvement in the cell efficiency (from 4.1 to 19.5%) is achieved.
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Polyaniline: A historical survey
E.M. Geniès, A. Boyle, C. Tsintavis · Synthetic Metals · 1990 · 1.2K citations