Charge Transport in PEDOT:PSS and Blends

Abstract

Charge transport properties and metal-insulator transition in conducting polymers de pend on doping, disorder and the complex nanomorphology. Conductivity of poly(3,4- ethylenedioxythiophene):poly(styrene-sulfonate) [PEDOT:PSS] can be varied by solvent pro cessing methods, thereby tuning the delocalization of carriers. Understanding and controlling charge transport in conducting polymers is crucial, not only for device applications, also in understanding the underlying physics of localization and interactions of charge carriers in disordered system. This thesis reports charge transport in conducting polymer PEDOT:PSS and blends. The thesis consists of seven chapter. First chapter gives introduction to con ducting polymers and charge transport properties. The sample preparation and experimental details are discussed in second chapter. The charge transport in PEDOT:PSS with additives is presented in third chapter. Fourth chapter discusses scaling of conductivity near metal insulator transition and critical exponents in conducting polymers. Fifth chapter focuses on scaling of conductivity by electric field and temperature in PEDOT:PSS. Chapter six elaborates charge transport in blends of PEDOT:PSS with nonconducting polymers