Charge carrier photogeneration in conjugated polymer
(2002) 11th International Symposium on Ultrafast Phenomena in Semiconductors (11-UFPS) 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:
https://lup.lub.lu.se/record/341344
- author
- Gulbinas, V ; Kananavicius, R ; Valkunas, L ; Bassler, H and Sundström, Villy LU
- organization
- publishing date
- 2002
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- photoconductivity, charge carriers, conjugated polymer, ultrafast spectroscopy, Stark-shift, excitons
- host publication
- Ultrafast phenomena in semiconductors 2001 / Material Science Forum
- editor
- Asmontas, Steponas ; Dargys, Adolfas and Roskos, Hartmut G.
- volume
- 384-385
- pages
- 279 - 286
- publisher
- Trans Tech Publications
- conference name
- 11th International Symposium on Ultrafast Phenomena in Semiconductors (11-UFPS)
- conference location
- Vilnius, Lithuania
- conference dates
- 2001-08-27 - 2001-08-29
- external identifiers
-
- wos:000174536100050
- scopus:0036170006
- ISSN
- 0255-5476
- ISBN
- 0-87849-890-7
- 978-0-87849-890-1
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- 33b3c94f-5345-4878-aef4-3e91ddf03f7a (old id 341344)
- alternative location
- http://www.scientific.net/0-87849-890-7/279/
- date added to LUP
- 2016-04-01 16:23:15
- date last changed
- 2022-03-22 18:21:30
@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}},
keywords = {{photoconductivity; charge carriers; conjugated polymer; ultrafast spectroscopy; Stark-shift; excitons}},
language = {{eng}},
pages = {{279--286}},
publisher = {{Trans Tech Publications}},
title = {{Charge carrier photogeneration in conjugated polymer}},
url = {{http://www.scientific.net/0-87849-890-7/279/}},
volume = {{384-385}},
year = {{2002}},
}