Regensburg 2019 – wissenschaftliches Programm
CPP 1: Focus: Morphology of Complex Polymer Mesophases: From Experiment to Modelling - organized by Kostas Daoulas and Volker Abetz
CPP 1.4: Hauptvortrag
Montag, 1. April 2019, 10:45–11:15, H14
Controlling structure, orientation and nanomorphology in semi-conducting and conducting polymer films — •Martin Brinkmann, Laure Biniek, Vishnu Vijayakumar, and Viktoriia Untilova — Université de Strasbourg, Institut Charles Sadron, CNRS, Strasbourg, France
Conducting and semi-conducting polymers are omnipresent in plastic electronics nowadays. Although structure-property correlations are central for device optimization, there is still insufficient understanding of the mechanisms and principles that govern thin film growth and chain packing, especially for the recent low band gap polymers of increasing molecular complexity e.g. p(NDIT2OD), PTB7, PCE11 and PCPDTBT. Crystallization/orientation of polymer semiconductors using epitaxy or high temperature rubbing is an elegant manner to tune their structure and organization that can further be investigated by transmission electron microscopy at different length scales. This contribution summarizes recent efforts of our group in this context and shows how the progress in mastering crystallization/orientation of semi-conducting polymers can be transposed to their conducting counterparts after soft doping. We demonstrate the possibility to fabricate highly oriented conducting polymer films whose charge conductivity and thermopower can reach beyond that of iodine-doped polyacetylene.