Vibrational signatures of electrochemical p- and n-doping of poly(3,4-ethylenedioxythiophene) films: an in situ attenuated total reflection Fourier transform infrared (ATR-FTIR) study

摘要

The vibrational spectroscopic properties of electrochemically synthesized poly (3,4-ethylenedioxythiophene)(PEDOT) films were studied with in situ Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) spectroscopy. PEDOT films were p-doped (oxidized) and n-doped (reduced) electrochemically. The doping induced infrared absorption spectra (IRAV spectra) during p- and n-doping of PEDOT films were studied comparatively. The results are discussed within the framework of a stronger localization of charges in the case of n-doping compared to p-doping.