Evidence for temperature independent triplet diffusion in a ladder type conjugated polymer
Evidence for temperature independent triplet diffusion in a ladder type conjugated polymer
We study the temperature dependence of triplet formation and decay by considering the phosphorescence dynamics in a prototypical conjugated polymer matrix. The dynamics of triplet formation as a function of temperature are unraveled by applying an electric field during optical singlet generation and recording the phosphorescence quenching. The diffusivity of triplet excitons in conjugated polymers is shown to be independent of temperature up to 200 K. We propose a diffusion model that describes the relaxation dynamics of triplet excitons at all times through triplet-triplet annihilation and spin orbit coupling at static heavy atom sites.
polymers, triplet state, phosphorescence, radiation quenching, excitons, spin-orbit interactions, diffusion
241201(R)-[4pp]
Reufer, M.
76008a69-3579-4764-afae-690fff71bb11
Lagoudakis, P.G.
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Walter, M.J.
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Lupton, J.M.
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Feldmann, J.
98d048f6-c77d-47b1-827c-256b8f04ee70
Scherf, U.
9e18129d-e072-4304-aa63-cc1ee286c41c
8 December 2006
Reufer, M.
76008a69-3579-4764-afae-690fff71bb11
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Walter, M.J.
0c42b17e-46f6-47d5-bd4a-ebe58aaec746
Lupton, J.M.
48290c8f-dc29-47f3-9045-2281590587e9
Feldmann, J.
98d048f6-c77d-47b1-827c-256b8f04ee70
Scherf, U.
9e18129d-e072-4304-aa63-cc1ee286c41c
Reufer, M., Lagoudakis, P.G., Walter, M.J., Lupton, J.M., Feldmann, J. and Scherf, U.
(2006)
Evidence for temperature independent triplet diffusion in a ladder type conjugated polymer.
Physical Review B, 74 (24R), .
(doi:10.1103/PhysRevB.74.241201).
Abstract
We study the temperature dependence of triplet formation and decay by considering the phosphorescence dynamics in a prototypical conjugated polymer matrix. The dynamics of triplet formation as a function of temperature are unraveled by applying an electric field during optical singlet generation and recording the phosphorescence quenching. The diffusivity of triplet excitons in conjugated polymers is shown to be independent of temperature up to 200 K. We propose a diffusion model that describes the relaxation dynamics of triplet excitons at all times through triplet-triplet annihilation and spin orbit coupling at static heavy atom sites.
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Published date: 8 December 2006
Keywords:
polymers, triplet state, phosphorescence, radiation quenching, excitons, spin-orbit interactions, diffusion
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Local EPrints ID: 50874
URI: http://eprints.soton.ac.uk/id/eprint/50874
ISSN: 1550-235X
PURE UUID: e44c7cd7-3411-418e-9ca5-aa28ff8c9680
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Date deposited: 09 Apr 2008
Last modified: 25 Apr 2019 16:31
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Author:
M. Reufer
Author:
M.J. Walter
Author:
J.M. Lupton
Author:
J. Feldmann
Author:
U. Scherf
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