Improved Hole-Transporting Properties in Conjugated Polymers Mixed with Polystyrene as an Insulating Polymer

Herein, we study hole transport properties in various conjugated conducting polymers blended with polystyrene (PS) as an insulating polymer. By analyzing macroscopic current density–voltage characteristics, we found that the mobility is improved for the conjugated conducting polymers diluted in the PS matrix that exhibit a redshift in absorption spectra. This is probably ascribed to more ordered polymer chains caused by the addition of PS. We believe that such a dilution of polymer chains would be versatile strategies to enhancing charge transport properties, which will offer a breakthrough towards highly efficient wearable optoelectronic devices based on the conjugated polymers.