Ultrafast Excitation Transfer and Trapping in a Thin Polymer Film.
Grage, Mette LU ; Zausjitsyn, Yuri LU ; Yartsev, Arkady LU
; Chachisvilis, Mirianas
LU
; Sundström, Villy
LU
and Pullerits, Tönu
LU
(2003)
In Physical Review B (Condensed Matter and Materials Physics)
67(20).
p.1-205207
- Abstract
- Transient absorption anisotropy of a polythiophene polymer in a thin film was studied on a femtosecond time scale. The anisotropy has a non-exponential decay on the sub-picosecond time scale, with a fastest component characterized by an ∼40 fs time constant. To simulate the anisotropy decay an incoherent energy migration model has been used. Comparison between the simulated and experimental kinetics enabled us to estimate the nearest-neighbor pair wise hopping time (τh=1±0.1 ps), the fraction of the interchain aggregates (∼10%) and the structural disorder of the polymer. The initial ∼30 fs anisotropy decay does not originate from incoherent hopping energy transfer but from some other relaxation among electronic excited states within a... (More)
- Transient absorption anisotropy of a polythiophene polymer in a thin film was studied on a femtosecond time scale. The anisotropy has a non-exponential decay on the sub-picosecond time scale, with a fastest component characterized by an ∼40 fs time constant. To simulate the anisotropy decay an incoherent energy migration model has been used. Comparison between the simulated and experimental kinetics enabled us to estimate the nearest-neighbor pair wise hopping time (τh=1±0.1 ps), the fraction of the interchain aggregates (∼10%) and the structural disorder of the polymer. The initial ∼30 fs anisotropy decay does not originate from incoherent hopping energy transfer but from some other relaxation among electronic excited states within a spectroscopic unit. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/128162
- author
- Grage, Mette
LU
; Zausjitsyn, Yuri
LU
; Yartsev, Arkady
LU
; Chachisvilis, Mirianas
LU
; Sundström, Villy
LU
and Pullerits, Tönu
LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 67
- issue
- 20
- pages
- 1 - 205207
- publisher
- American Physical Society
- external identifiers
-
- wos:000183483200034
- scopus:1442322833
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.67.205207
- 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
- 26f76194-a114-46e4-9142-3acd5fe09d9e (old id 128162)
- date added to LUP
- 2016-04-01 15:51:21
- date last changed
- 2022-03-22 06:38:46
@article{26f76194-a114-46e4-9142-3acd5fe09d9e,
abstract = {{Transient absorption anisotropy of a polythiophene polymer in a thin film was studied on a femtosecond time scale. The anisotropy has a non-exponential decay on the sub-picosecond time scale, with a fastest component characterized by an ∼40 fs time constant. To simulate the anisotropy decay an incoherent energy migration model has been used. Comparison between the simulated and experimental kinetics enabled us to estimate the nearest-neighbor pair wise hopping time (τh=1±0.1 ps), the fraction of the interchain aggregates (∼10%) and the structural disorder of the polymer. The initial ∼30 fs anisotropy decay does not originate from incoherent hopping energy transfer but from some other relaxation among electronic excited states within a spectroscopic unit.}},
author = {{Grage, Mette and Zausjitsyn, Yuri and Yartsev, Arkady and Chachisvilis, Mirianas and Sundström, Villy and Pullerits, Tönu}},
issn = {{1098-0121}},
language = {{eng}},
number = {{20}},
pages = {{1--205207}},
publisher = {{American Physical Society}},
series = {{Physical Review B (Condensed Matter and Materials Physics)}},
title = {{Ultrafast Excitation Transfer and Trapping in a Thin Polymer Film.}},
url = {{http://dx.doi.org/10.1103/PhysRevB.67.205207}},
doi = {{10.1103/PhysRevB.67.205207}},
volume = {{67}},
year = {{2003}},
}