TITLE

Role of diffusion in two-dimensional bimolecular recombination

AUTHOR(S)
Nenashev, A. V.; Jansson, F.; Baranovskii, S. D.; Österbacka, R.; Dvurechenskii, A. V.; Gebhard, F.
PUB. DATE
May 2010
SOURCE
Applied Physics Letters;5/24/2010, Vol. 96 Issue 21, p213304
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Experiments on carrier recombination in two-dimensional organic structures are often interpreted in the frame of the Langevin model with taking into account only the drift of the charge carriers in their mutual electric field. While this approach is well justified for three-dimensional systems, it is in general not valid for two-dimensional structures where the contribution of diffusion can play a dominant role. We study the two-dimensional Langevin recombination theoretically and find the critical concentration below which diffusion cannot be neglected. For typical experimental conditions, neglecting the diffusion leads to an underestimation of the recombination rate by several times.
ACCESSION #
51059256

 

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