TY  - GEN
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/23777/
AV  - public
A1  - Müller, Lars
TI  - On the Correlation Between Structural Order and Molecular Doping in Semiconducting Polymers
N2  - On the Correlation Between Structural Order and Molecular Doping in Semiconducting Polymers - In contrast to the improved understanding of pristine organic semiconductors that has been developed over the last decades, fundamental questions about the complex interplay between molecular doping and structural order in semiconducting polymers are still to be answered. In the present work, new insights on this interplay were unveiled using electron diffraction, spectroscopic methods, and electrical characterization. The doped polymer P3HT was explored in three states: in the solution before film formation, in the static thin film, and in a dynamic non-equilibrium state. Mechanisms related to the charging upon doping were found to govern the formation of order in the polymer P3HT already in the solution state. In doped solid films, the controversially discussed change of polymer crystal lattice spacing upon doping was examined, and a model explaining the changes based on the doping-induced charges was developed. In non-equilibrium conditions, the semi-crystalline morphology of the polymer P3HT was found to be an important prerequisite for the diffusion of dopants. Furthermore, an electric-field-controlled drift of molecular dopants was demonstrated and analyzed in detail for the first time. Proof of concept memory and memristive devices illustrate potential applications of this controlled dopant drift.
CY  - Heidelberg
ID  - heidok23777
Y1  - 2018///
ER  -