Exciton diffusion and relaxation in methyl-substituted polyparaphenylene polymer films
Gulbinas, V ; Mineviciute, I ; Hertel, D ; Wellander, R ; Yartsev, Arkady LU
and Sundström, Villy
LU
(2007)
In Journal of Chemical Physics
127(14).
- Abstract
- Exciton diffusion in ladder-type methyl-substituted polyparaphenylene film and solution was investigated by means of femtosecond pump-probe spectroscopy using a combined approach, analyzing exciton-exciton annihilation, and transient absorption depolarization properties. We show that the different views on the exciton dynamics offered by anisotropy decay and annihilation are required in order to obtain a correct picture of the energy transfer dynamics. Comparison of the exciton diffusion coefficient and exciton diffusion radius obtained for polymer film with the two techniques reveals that there is substantial short-range order in the film. Also in isolated chains there is considerable amount of order, as revealed from only partial... (More)
- Exciton diffusion in ladder-type methyl-substituted polyparaphenylene film and solution was investigated by means of femtosecond pump-probe spectroscopy using a combined approach, analyzing exciton-exciton annihilation, and transient absorption depolarization properties. We show that the different views on the exciton dynamics offered by anisotropy decay and annihilation are required in order to obtain a correct picture of the energy transfer dynamics. Comparison of the exciton diffusion coefficient and exciton diffusion radius obtained for polymer film with the two techniques reveals that there is substantial short-range order in the film. Also in isolated chains there is considerable amount of order, as revealed from only partial anisotropy decay, which shows that only a small fraction of the excitons move to differently oriented polymer segments. It is further concluded that interchain energy transfer is faster than intrachain transfer, mainly as a result of shorter interchain distances between chromophoric units. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/655209
- author
- Gulbinas, V
; Mineviciute, I
; Hertel, D
; Wellander, R
; Yartsev, Arkady
LU
and Sundström, Villy
LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Chemical Physics
- volume
- 127
- issue
- 14
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000250140800065
- scopus:35248823234
- ISSN
- 0021-9606
- DOI
- 10.1063/1.2790901
- 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
- d7a9c1bc-ce2f-4bca-bdb2-41de2d05b243 (old id 655209)
- date added to LUP
- 2016-04-01 12:07:17
- date last changed
- 2022-01-26 23:03:05
@article{d7a9c1bc-ce2f-4bca-bdb2-41de2d05b243,
abstract = {{Exciton diffusion in ladder-type methyl-substituted polyparaphenylene film and solution was investigated by means of femtosecond pump-probe spectroscopy using a combined approach, analyzing exciton-exciton annihilation, and transient absorption depolarization properties. We show that the different views on the exciton dynamics offered by anisotropy decay and annihilation are required in order to obtain a correct picture of the energy transfer dynamics. Comparison of the exciton diffusion coefficient and exciton diffusion radius obtained for polymer film with the two techniques reveals that there is substantial short-range order in the film. Also in isolated chains there is considerable amount of order, as revealed from only partial anisotropy decay, which shows that only a small fraction of the excitons move to differently oriented polymer segments. It is further concluded that interchain energy transfer is faster than intrachain transfer, mainly as a result of shorter interchain distances between chromophoric units.}},
author = {{Gulbinas, V and Mineviciute, I and Hertel, D and Wellander, R and Yartsev, Arkady and Sundström, Villy}},
issn = {{0021-9606}},
language = {{eng}},
number = {{14}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Journal of Chemical Physics}},
title = {{Exciton diffusion and relaxation in methyl-substituted polyparaphenylene polymer films}},
url = {{http://dx.doi.org/10.1063/1.2790901}},
doi = {{10.1063/1.2790901}},
volume = {{127}},
year = {{2007}},
}