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

Scientific paper - Original scientific paper

• Author: Ivan Jurić
• Author: Ivo Batistić
• Author: Eduard Tutiš
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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.

• Keywords (english): electroluminescent devices; electron-hole recombination; excitons; interface phenomena; interface roughness; organic light emitting diodes
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical review B: Condensed matter and materials physics
• Numbering: vol. 77, no. 16, 165304
• p-ISSN: 1098-0121
• e-ISSN: 1550-235X
• DOI: https://doi.org/10.1103/PhysRevB.77.165304
• URN:NBN: urn:nbn:hr:217:884669
• Publication: 2008
• Project: Number: 035-0352826-2847; Title (croatian): Modeliranje fizikalnih svojstava materijala s izraženom frustracijom ili neredom; Leader: Eduard Tutiš; Jurisdiction: Croatia; Funding stream: ZP
• Project: Number: 119-1191458-0512; Title (croatian): Niskodimenzionalni jako korelirani vodljivi sustavi; Leader: Slaven Barišić; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: http://link.aps.org/doi/10.1103/PhysRevB.77.165304
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2008) by the American Physical Society. Received 30 October 2007; revised manuscript received 25 January 2008; published 2 April 2008.
• Created on: 2019-10-18 21:24:28