Interchain photoluminescence in substituted polyfluorenes

M. Theander; D. M. Johansson; A. Ruseckas; Donatas Zigmantas; M. R. Andersson; Villy Sundström; O. Inganas

doi:10.1016/S0379-6779(00)00788-8

Interchain photoluminescence in substituted polyfluorenes

M. Theander, D. M. Johansson, A. Ruseckas, Donatas Zigmantas, M. R. Andersson, Villy Sundström, O. Inganas

Chemical Physics

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	615-616
Journal	Synthetic Metals
Volume	119
Issue number	1-3
DOIs	https://doi.org/10.1016/S0379-6779(00)00788-8
Publication status	Published - 2001

Bibliographical note

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)

Subject classification (UKÄ)

Atom and Molecular Physics and Optics

Keywords

photoluminescence
uv-vis-nir absorption
polyfluorenes and derivatives
time-resolved fast spectroscopy

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10.1016/S0379-6779(00)00788-8

Cite this

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title = "Interchain photoluminescence in substituted polyfluorenes",

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.",

keywords = "photoluminescence, uv-vis-nir absorption, polyfluorenes and derivatives, time-resolved fast spectroscopy",

author = "M. Theander and Johansson, {D. M.} and A. Ruseckas and Donatas Zigmantas and Andersson, {M. R.} and Villy Sundstr{\"o}m and O. Inganas",

note = "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)",

year = "2001",

doi = "10.1016/S0379-6779(00)00788-8",

language = "English",

volume = "119",

pages = "615--616",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier",

number = "1-3",

}

TY - JOUR

T1 - Interchain photoluminescence in substituted polyfluorenes

AU - Theander, M.

AU - Johansson, D. M.

AU - Ruseckas, A.

AU - Zigmantas, Donatas

AU - Andersson, M. R.

AU - Sundström, Villy

AU - Inganas, O.

N1 - 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)

PY - 2001

Y1 - 2001

N2 - 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.

AB - 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.

KW - photoluminescence

KW - uv-vis-nir absorption

KW - polyfluorenes and derivatives

KW - time-resolved fast spectroscopy

U2 - 10.1016/S0379-6779(00)00788-8

DO - 10.1016/S0379-6779(00)00788-8

M3 - Article

SN - 0379-6779

VL - 119

SP - 615

EP - 616

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

ER -

Interchain photoluminescence in substituted polyfluorenes

Abstract

Bibliographical note

Subject classification (UKÄ)

Keywords

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