Cargando…

Dynamics of Frenkel Excitons in Pentacene

The dispersion relation for noninteracting excitons and the influence of perturbative corrections are examined in the case of pentacene structure. The values of exchange integrals are determined by nonlinear fits to the experimental dispersion data, obtained by the inelastic electron scattering repo...

Descripción completa

Detalles Bibliográficos
Autores principales: Gombar, Sonja, Mali, Petar, Pantić, Milan, Pavkov-Hrvojević, Milica, Radošević, Slobodan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6266919/
https://www.ncbi.nlm.nih.gov/pubmed/30413088
http://dx.doi.org/10.3390/ma11112219
_version_ 1783375946951163904
author Gombar, Sonja
Mali, Petar
Pantić, Milan
Pavkov-Hrvojević, Milica
Radošević, Slobodan
author_facet Gombar, Sonja
Mali, Petar
Pantić, Milan
Pavkov-Hrvojević, Milica
Radošević, Slobodan
author_sort Gombar, Sonja
collection PubMed
description The dispersion relation for noninteracting excitons and the influence of perturbative corrections are examined in the case of pentacene structure. The values of exchange integrals are determined by nonlinear fits to the experimental dispersion data, obtained by the inelastic electron scattering reported in recent experiments. We obtain theoretical dispersion curves along four different directions in the Brillouin zone which possess the same periodicity as the experimental data. We also show that perturbative corrections are negligible since the exciton gap in the dispersion relation is huge in comparison to the exchange integrals.
format Online
Article
Text
id pubmed-6266919
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-62669192018-12-17 Dynamics of Frenkel Excitons in Pentacene Gombar, Sonja Mali, Petar Pantić, Milan Pavkov-Hrvojević, Milica Radošević, Slobodan Materials (Basel) Article The dispersion relation for noninteracting excitons and the influence of perturbative corrections are examined in the case of pentacene structure. The values of exchange integrals are determined by nonlinear fits to the experimental dispersion data, obtained by the inelastic electron scattering reported in recent experiments. We obtain theoretical dispersion curves along four different directions in the Brillouin zone which possess the same periodicity as the experimental data. We also show that perturbative corrections are negligible since the exciton gap in the dispersion relation is huge in comparison to the exchange integrals. MDPI 2018-11-08 /pmc/articles/PMC6266919/ /pubmed/30413088 http://dx.doi.org/10.3390/ma11112219 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gombar, Sonja
Mali, Petar
Pantić, Milan
Pavkov-Hrvojević, Milica
Radošević, Slobodan
Dynamics of Frenkel Excitons in Pentacene
title Dynamics of Frenkel Excitons in Pentacene
title_full Dynamics of Frenkel Excitons in Pentacene
title_fullStr Dynamics of Frenkel Excitons in Pentacene
title_full_unstemmed Dynamics of Frenkel Excitons in Pentacene
title_short Dynamics of Frenkel Excitons in Pentacene
title_sort dynamics of frenkel excitons in pentacene
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6266919/
https://www.ncbi.nlm.nih.gov/pubmed/30413088
http://dx.doi.org/10.3390/ma11112219
work_keys_str_mv AT gombarsonja dynamicsoffrenkelexcitonsinpentacene
AT malipetar dynamicsoffrenkelexcitonsinpentacene
AT panticmilan dynamicsoffrenkelexcitonsinpentacene
AT pavkovhrvojevicmilica dynamicsoffrenkelexcitonsinpentacene
AT radosevicslobodan dynamicsoffrenkelexcitonsinpentacene