Interchain photoluminescence in substituted polyfluorenes
(2001) In Synthetic Metals 119(1-3). p.615-616- Abstract
- We have characterised the interchain emitting states of two substituted polyfluorenes with steady-state and time-resolved photoluminescence (PL). Site selective excitation of the interchain state shows that physical dimers are formed in the film. These dimers have low concentration in the films but exciton diffusion to the dimers is reducing the intrachain exciton lifetime. With asymmetrical substituents, the PL quantum yield is higher and the PL lifetime is longer due to lower concentration of dimers. Slow cooling from the melt, gives a new red shifted emission band and less intrachain emission. A discrepancy in the calculated radiative lifetimes suggest a fast formation of this new band.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1433037
- author
- Theander, M.
; Johansson, D. M.
; Ruseckas, A.
; Zigmantas, Donatas
LU
; Andersson, M. R. ; Sundström, Villy LU and Inganas, O.
- organization
- publishing date
- 2001
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- photoluminescence, uv-vis-nir absorption, polyfluorenes and derivatives, time-resolved fast spectroscopy
- in
- Synthetic Metals
- volume
- 119
- issue
- 1-3
- pages
- 615 - 616
- publisher
- Elsevier
- external identifiers
-
- scopus:0035867509
- ISSN
- 0379-6779
- DOI
- 10.1016/S0379-6779(00)00788-8
- 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
- 22b9cabf-d36d-46ba-99ef-39c1c5f0717a (old id 1433037)
- date added to LUP
- 2016-04-01 17:03:49
- date last changed
- 2022-01-29 00:06:28
@article{22b9cabf-d36d-46ba-99ef-39c1c5f0717a, abstract = {{We have characterised the interchain emitting states of two substituted polyfluorenes with steady-state and time-resolved photoluminescence (PL). Site selective excitation of the interchain state shows that physical dimers are formed in the film. These dimers have low concentration in the films but exciton diffusion to the dimers is reducing the intrachain exciton lifetime. With asymmetrical substituents, the PL quantum yield is higher and the PL lifetime is longer due to lower concentration of dimers. Slow cooling from the melt, gives a new red shifted emission band and less intrachain emission. A discrepancy in the calculated radiative lifetimes suggest a fast formation of this new band.}}, author = {{Theander, M. and Johansson, D. M. and Ruseckas, A. and Zigmantas, Donatas and Andersson, M. R. and Sundström, Villy and Inganas, O.}}, issn = {{0379-6779}}, keywords = {{photoluminescence; uv-vis-nir absorption; polyfluorenes and derivatives; time-resolved fast spectroscopy}}, language = {{eng}}, number = {{1-3}}, pages = {{615--616}}, publisher = {{Elsevier}}, series = {{Synthetic Metals}}, title = {{Interchain photoluminescence in substituted polyfluorenes}}, url = {{http://dx.doi.org/10.1016/S0379-6779(00)00788-8}}, doi = {{10.1016/S0379-6779(00)00788-8}}, volume = {{119}}, year = {{2001}}, }