Role of Diffusion in Two-dimensional Bimolecular Recombination - Condensed Matter > Disordered Systems and Neural NetworksReportar como inadecuado




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Abstract: Experiments on carrier recombination in two-dimensional organic structuresare often interpreted in the frame of the Langevin model with taking intoaccount only the drift of the charge carriers in their mutual electric field.While this approach is well justified for three-dimensional systems, it is ingeneral not valid for two-dimensional structures, where the contribution ofdiffusion can play a dominant role. We study the two-dimensional Langevinrecombination theoretically and find the critical concentration below whichdiffusion cannot be neglected. For typical experimental conditions, neglectingthe diffusion leads to an underestimation of the recombination rate by severaltimes.



Autor: A. V. Nenashev, F. Jansson, S. D. Baranovskii, R. Österbacka, A. V. Dvurechenskii, F. Gebhard

Fuente: https://arxiv.org/







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