Nonliner dynamics of corrugated doping fronts in organic optoelectronic devices
2012 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 85, no 24, 245212- p.Article in journal (Refereed) Published
Recently, it was demonstrated that electrochemical doping fronts in organic semiconductors exhibit a new fundamental instability growing from multidimensional perturbations [ Bychkov et al. Phys. Rev. Lett. 107 016103 (2011)]. In the instability development, linear growth of tiny perturbations goes over into a nonlinear stage of strongly distorted doping fronts. Here we develop the nonlinear theory of the doping front instability and predict the key parameters of a corrugated doping front, such as its velocity, in close agreement with the experimental data. We show that the instability makes the electrochemical doping process considerably faster. We obtain the self-similar properties of the front shape corresponding to the maximal propagation velocity, which allows for a wide range of controlling the doping process in the experiments. The developed theory provides the guide for optimizing the performance of organic optoelectronic devices such as light-emitting electrochemical cells.
Place, publisher, year, edition, pages
2012. Vol. 85, no 24, 245212- p.
Condensed Matter Physics
Research subject Theoretical Physics; Solid State Physics; Physics Of Matter; Electronics
IdentifiersURN: urn:nbn:se:umu:diva-57334DOI: 10.1103/PhysRevB.85.245212ISI: 000305558500003OAI: oai:DiVA.org:umu-57334DiVA: diva2:541011