Recombination at heterojunctions in disordered organic media: Modeling and numerical simulations

Jurić, Ivan and Batistić, Ivo and Tutiš, Eduard (2008) Recombination at heterojunctions in disordered organic media: Modeling and numerical simulations. Physical Review B, 77 (16). pp. 165304-13. ISSN 1098-0121

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Abstract

Multilayer organic electroluminescent devices derive their advantages over their single-layer counterparts from the processes occurring at heterojunctions in organic media. These processes significantly differ from those in the bulk of the material. This paper presents three-dimensional modeling, numerical simulations, and a discussion of transport and recombination in a system with a heterojunction. We consider partial cross sections for the creation of excitons and exciplexes, and probabilities for recombination in the respective channels. We examine the influence of the energy barrier, electric field, site-energy disorder, and structural disorder at an organic-organic interface on transport and recombination. In particular, we investigate optimal parameter domains for recombination in the exciton channel. The interface roughness, unlike the site-energy disorder, is found to strongly affect the partial cross sections.

Item Type: Article
Keywords: electroluminescent devices ; electron-hole recombination ; excitons ; interface phenomena ; interface roughness ; organic light emitting diodes
Date: April 2008
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2008) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 035-0352826-2847, 119-1191458-0512
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 29 May 2014 19:20
Last Modified: 29 May 2014 19:20
URI: http://digre.pmf.unizg.hr/id/eprint/1962

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