1：Experimental Design and Method Selection:

The study employed potentiodynamic electropolymerization to synthesize PEDOT/GO composites in aqueous and ionic liquid electrolytes. Electrochemical characterization was performed using cyclic voltammetry and electrochemical impedance spectroscopy. Spectroelectrochemical analysis included in situ UV-Vis and ATR-FTIR spectroscopy to monitor film formation, electronic properties, and charge carrier dynamics during p-doping.

2：Sample Selection and Data Sources:

Samples included PEDOT(PSS) and PEDOT(GO)(aq) films synthesized in aqueous solutions, and PEDOT(IL) and PEDOT(GO)(IL) films synthesized in ionic liquid [Bmim][BF4]. Graphene oxide was prepared by a modified Hummers method.

3：4]. Graphene oxide was prepared by a modified Hummers method. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included Autolab PGSTAT101 and IviumStat potentiostats, Cary 60 spectrophotometer, Bruker Vertex 70 spectrometer with Harrick Seagull accessory, and Leica EM ACE200 sputtering device. Materials included EDOT, KCl, TBA-BF4, acetonitrile, [Bmim][BF4], graphene oxide, Pt electrodes, ITO-coated quartz glass, and ZnSe hemisphere windows.

4：Experimental Procedures and Operational Workflow:

Films were electrosynthesized on Pt-minielectrodes, ITO glass, or Pt-sputtered ZnSe windows using specific potential ranges and scan rates. Electrochemical characterization involved cyclic voltammetry and impedance spectroscopy in various electrolytes. In situ spectroelectrochemistry was performed during polymerization and p-doping cycles, with spectra recorded at selected potential intervals.

5：Data Analysis Methods:

Data analysis involved interpreting cyclic voltammograms, Nyquist plots from impedance spectroscopy, UV-Vis absorbance spectra, and ATR-FTIR spectra to assess electroactivity, charge transfer, optical properties, and vibrational changes.