Synthesis and Optical and Transport Properties of a Phenyl-Substituted Polythiophene

The synthesis and characterization of a novel polythiophene substituted with a 2'-pentyloxy-5'-(1'''-oxooctyl) phenyl group (PPOPT) is reported. The bulk transport properties of thin films of PPOPT are investigated by admittance spectroscopy. The dramatic effect of the phenyl side chain on the mobility of positive carriers in films of PPOPT is described. The photophysics of PPOPT in both solution and thin film is also investigated and correlated to substituent-driven intrachain and interchain arrangements