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Nonliner dynamics of corrugated doping fronts in organic optoelectronic devices
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
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
Abstract [en]

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.
National Category
Condensed Matter Physics
Research subject
Theoretical Physics; Solid State Physics; Physics Of Matter; Electronics
Identifiers
URN: urn:nbn:se:umu:diva-57334DOI: 10.1103/PhysRevB.85.245212ISI: 000305558500003OAI: oai:DiVA.org:umu-57334DiVA: diva2:541011
Available from: 2012-07-13 Created: 2012-07-13 Last updated: 2017-12-07Bibliographically approved

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Bychkov, VitalyJukimenko, OlexyModestov, MikhailMarklund, Mattias

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