Impact of Electrocatalytic Activities of Doping Surfactants on Polyaniline as Pt-free Counter Electrode in DSSCs

摘要

A series of composite counter electrodes were chemically synthesized by doping surfactants with,Ganodermalucidum Polysaccharide (GLP), Sodium dodecyl sulfate (SDS)and Ethylenediaminetetraacetic acid (EDTA) disodium salt on polyaniline (PANI) for Dye-sensitizedsolar cells (DSSCs). Surfactants can reduce the surface tension of the liquid, along with changing theconductivity and morphology of PANI. Scanning electron microscopy (SEM) results showed thatPANI electrode morphology was strongly influenced by the surfactant. The electrochemical activity ofsurfactant-doping PANI was investigated by cyclic voltammetry (CV) curve, electrochemicalimpedance spectroscopy (EIS), Tafel polarization curve and current density–voltage curves (J-V). Thepower conversion efficiency (PCE) of PANI-doped CEs with additions of SDS, GLP and EDTAdisodium salt (4.25%, 2.69% and 2.51%) were higher than 2.29% for PANI CE without doping. Theseresults indicate a potential application of surfactants doped polyaniline as counter electrode in costeffective DSSCs.