Excited state dynamics in alternating polyfluorene copolymers
Jespersen, Kim LU ; Yartsev, Arkady LU
; Pascher, Torbjörn
LU
and Sundström, Villy
LU
(2005)
In Synthetic Metals
155(2).
p.262-265
- Abstract
- We present the excited state dynamics of the low band gap alternating polyfluorene copolymer, DiO-PFDTBT. The copolymer structure is an alternating sequence of donor and acceptor units consisting of 9,9-dioctyl-9H-fluorene and 4,7-di-thiophen-2-yl-benzo[1,2,5]thiadiazolyl units. Calculations have predicted that the first excited state has charge transfer character, while the second strongly allowed excited state is a delocalized π-conjugated state. We show that the excited state dynamics involves internal conversion (IC) from the second strongly allowed excited state to the first excited state. Furthermore, excitation energy transfer (EET) on the 1–10 ps time scale is observed as well as a subsequent formation of a stabilized long-lived... (More)
- We present the excited state dynamics of the low band gap alternating polyfluorene copolymer, DiO-PFDTBT. The copolymer structure is an alternating sequence of donor and acceptor units consisting of 9,9-dioctyl-9H-fluorene and 4,7-di-thiophen-2-yl-benzo[1,2,5]thiadiazolyl units. Calculations have predicted that the first excited state has charge transfer character, while the second strongly allowed excited state is a delocalized π-conjugated state. We show that the excited state dynamics involves internal conversion (IC) from the second strongly allowed excited state to the first excited state. Furthermore, excitation energy transfer (EET) on the 1–10 ps time scale is observed as well as a subsequent formation of a stabilized long-lived emissive state, which has a decay time of 3.25 ns. The origin of this stabilized state is discussed in relation to the intrinsic charge transfer nature of the DiO-PFDTBT. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/157804
- author
- Jespersen, Kim
LU
; Yartsev, Arkady
LU
; Pascher, Torbjörn
LU
and Sundström, Villy
LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Synthetic Metals
- volume
- 155
- issue
- 2
- pages
- 262 - 265
- publisher
- Elsevier
- external identifiers
-
- wos:000234150000007
- scopus:28544433039
- ISSN
- 0379-6779
- DOI
- 10.1016/j.synthmet.2005.01.044
- 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
- ebed762e-709d-4985-b45a-072bebee8ff1 (old id 157804)
- date added to LUP
- 2016-04-01 15:56:07
- date last changed
- 2022-04-22 18:27:00
@article{ebed762e-709d-4985-b45a-072bebee8ff1,
abstract = {{We present the excited state dynamics of the low band gap alternating polyfluorene copolymer, DiO-PFDTBT. The copolymer structure is an alternating sequence of donor and acceptor units consisting of 9,9-dioctyl-9H-fluorene and 4,7-di-thiophen-2-yl-benzo[1,2,5]thiadiazolyl units. Calculations have predicted that the first excited state has charge transfer character, while the second strongly allowed excited state is a delocalized π-conjugated state. We show that the excited state dynamics involves internal conversion (IC) from the second strongly allowed excited state to the first excited state. Furthermore, excitation energy transfer (EET) on the 1–10 ps time scale is observed as well as a subsequent formation of a stabilized long-lived emissive state, which has a decay time of 3.25 ns. The origin of this stabilized state is discussed in relation to the intrinsic charge transfer nature of the DiO-PFDTBT.}},
author = {{Jespersen, Kim and Yartsev, Arkady and Pascher, Torbjörn and Sundström, Villy}},
issn = {{0379-6779}},
language = {{eng}},
number = {{2}},
pages = {{262--265}},
publisher = {{Elsevier}},
series = {{Synthetic Metals}},
title = {{Excited state dynamics in alternating polyfluorene copolymers}},
url = {{http://dx.doi.org/10.1016/j.synthmet.2005.01.044}},
doi = {{10.1016/j.synthmet.2005.01.044}},
volume = {{155}},
year = {{2005}},
}