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Charge carrier photogeneration in conjugated polymer

Gulbinas, V; Kananavicius, R; Valkunas, L; Bassler, H and Sundström, Villy LU (2002) 11th International Symposium on Ultrafast Phenomena in Semiconductors (11-UFPS) In Ultrafast phenomena in semiconductors 2001 / Material Science Forum 384-385. p.279-286
Abstract
The electric field-assisted charge carrier photogeneration in a Ladder-Type Methyl substituted Poly(Para-Phenylene) was investigated by studying the electromodulated ultrafast transient differential absorption spectra and kinetics. The field stimulated appearance of the polaron absorption and quenching of the singlet exciton absorption proves that dissociation of excitons into geminately bound electron-hole pairs occurs within the entire exciton lifetime and proceeds from the relaxed state. An influence of the optically created excitons and charge pairs on the Stark-shift of the absorption band was observed and interpreted as caused by the modification of the dielectric constant of the medium. The initial separation distance of the charge... (More)
The electric field-assisted charge carrier photogeneration in a Ladder-Type Methyl substituted Poly(Para-Phenylene) was investigated by studying the electromodulated ultrafast transient differential absorption spectra and kinetics. The field stimulated appearance of the polaron absorption and quenching of the singlet exciton absorption proves that dissociation of excitons into geminately bound electron-hole pairs occurs within the entire exciton lifetime and proceeds from the relaxed state. An influence of the optically created excitons and charge pairs on the Stark-shift of the absorption band was observed and interpreted as caused by the modification of the dielectric constant of the medium. The initial separation distance of the charge carriers and its evolution in time were determined from the Stark-shift dynamics. The initial separation distance was obtained being slightly larger than the distance between adjacent polymer chains. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
photoconductivity, charge carriers, conjugated polymer, ultrafast spectroscopy, Stark-shift, excitons
in
Ultrafast phenomena in semiconductors 2001 / Material Science Forum
editor
Asmontas, Steponas; Dargys, Adolfas; Roskos, Hartmut G.; ; and
volume
384-385
pages
279 - 286
publisher
Trans Tech Publications Ltd
conference name
11th International Symposium on Ultrafast Phenomena in Semiconductors (11-UFPS)
external identifiers
  • wos:000174536100050
  • scopus:0036170006
ISSN
0255-5476
ISBN
0-87849-890-7
978-0-87849-890-1
language
English
LU publication?
yes
id
33b3c94f-5345-4878-aef4-3e91ddf03f7a (old id 341344)
alternative location
http://www.scientific.net/0-87849-890-7/279/
date added to LUP
2007-08-22 08:47:39
date last changed
2017-01-01 07:03:54
@inproceedings{33b3c94f-5345-4878-aef4-3e91ddf03f7a,
  abstract     = {The electric field-assisted charge carrier photogeneration in a Ladder-Type Methyl substituted Poly(Para-Phenylene) was investigated by studying the electromodulated ultrafast transient differential absorption spectra and kinetics. The field stimulated appearance of the polaron absorption and quenching of the singlet exciton absorption proves that dissociation of excitons into geminately bound electron-hole pairs occurs within the entire exciton lifetime and proceeds from the relaxed state. An influence of the optically created excitons and charge pairs on the Stark-shift of the absorption band was observed and interpreted as caused by the modification of the dielectric constant of the medium. The initial separation distance of the charge carriers and its evolution in time were determined from the Stark-shift dynamics. The initial separation distance was obtained being slightly larger than the distance between adjacent polymer chains.},
  author       = {Gulbinas, V and Kananavicius, R and Valkunas, L and Bassler, H and Sundström, Villy},
  booktitle    = {Ultrafast phenomena in semiconductors 2001 / Material Science Forum},
  editor       = {Asmontas, Steponas and Dargys, Adolfas and Roskos, Hartmut G.},
  isbn         = {0-87849-890-7},
  issn         = {0255-5476},
  keyword      = {photoconductivity,charge carriers,conjugated polymer,ultrafast spectroscopy,Stark-shift,excitons},
  language     = {eng},
  pages        = {279--286},
  publisher    = {Trans Tech Publications Ltd},
  title        = {Charge carrier photogeneration in conjugated polymer},
  volume       = {384-385},
  year         = {2002},
}