title: Correlation of morphology and charge transport in poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid (PEDOT-PSS) films.
abstract: A wide variation in the charge transport properties of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) films is attributed to the degree of phase segregation of the excess insulating polyanion. The results indicate that the charge transport in PEDOT-PSS can vary from hopping to the critical regime of the metal-insulator transition, depending on the subtle details of morphology. The extent of electrical connectivity in the films, directly obtained from a temperature-dependent high-frequency transport study, indicates various limiting factors to the transport, which are correlated with the phase separation process. The low temperature magnetotransport further supports this morphology-dependent transport scenario.
authors.affiliation: Department of Physics, Indian Institute of Science, Bangalore 560012, India.
authors.forename: C S
authors.initials: CS
authors.lastname: Suchand Sangeeth
authors.forename: Manu
authors.initials: M
authors.lastname: Jaiswal
authors.forename: Reghu
authors.initials: R
authors.lastname: Menon