Abstract
Donor–acceptor composite layers made of the electrically conducting polymers p-type polyazulene (PAz) and n-type polybenzimidazobenzophenanthroline-poly(ethylene oxide) (BBL-PEO) were studied. The water dispersible BBL-PEO was solution-cast on PAz electropolymerized on Pt or ITO glass electrodes or on the bare electrode surfaces. The doping behavior within both the n- and p-doping potential regions was studied by cyclic voltammetry and in situ spectroelectrochemical techniques: UV–visible and FTIR-ATR spectroscopy. All of the results showed contributions from both polymers in the composites, besides the spectral behaviors in the n-doping potential region were mainly controlled by BBL-PEO and in the p-doping region by PAz. Rather stable donor–acceptor composites with the formation of charge carriers in both n- and p-doping regions were formed. In the BBL-PEO/PAz composite PAz was found to have a higher promoting effect on the formation of charge carriers than in the PAz/BBL-PEO composite. The composites st...
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