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Energy transfer processes among emitters dispersed in a single polymer layer for colour tuning in OLEDs

Energy transfer processes among emitters dispersed in a single polymer layer for colour tuning in OLEDs
Energy transfer processes among emitters dispersed in a single polymer layer for colour tuning in OLEDs

The energy transfer processes taking place in a single polymeric layer that enable the definition of the three primary colours (red, green and blue) in selected areas via photochemically induced emission tuning are discussed. The polymers used as hosts are two wide band gap polymers, PVK and a polyfluorenyl derivative. In the polymer matrix are dispersed the green emitter, 1-(4'-dimethyl-aminophenyl)-6-phenyl-1,3,5-hexatriene (DMA-DPH), the red emitter, 4-dimethylamino-4'-nitrostilbene (DANS) and a photoacid generator (PAG). Upon irradiation, protons are released from the PAG and they react gradually with the two emitters, causing the blue shift of the green emitter fluorescence and the extinction of the red emitter fluorescence. Depending on the protonation extent, the relative concentrations of the emitters and the exposure dose the energy transfer processes occurring inside the matrix result in definition of different colour emitting areas. The understanding of the energy transfer processes with photoluminescence experiments is a necessary first step in order to rationalize the selection of suitable components enabling the definition of the three primary colours in OLEDs.

1862-6300
2526-2531
Georgiadou, D. G.
84977176-3678-4fb3-a3dd-2044a49c853b
Vasilopoulou, M.
aad1381e-d091-4090-8c7c-b74bed22393d
Pistolis, G.
2a710db0-c97d-44bb-8ffc-896a7cd2a087
Palilis, L.
b09e9554-54da-4be5-aa08-bda894e2b86f
Dimotikali, D.
9c6d5002-c742-4576-b6dc-048acb0f1420
Argitis, P.
ab9c4ea6-3dd2-4e34-935d-81bfb360f358
Georgiadou, D. G.
84977176-3678-4fb3-a3dd-2044a49c853b
Vasilopoulou, M.
aad1381e-d091-4090-8c7c-b74bed22393d
Pistolis, G.
2a710db0-c97d-44bb-8ffc-896a7cd2a087
Palilis, L.
b09e9554-54da-4be5-aa08-bda894e2b86f
Dimotikali, D.
9c6d5002-c742-4576-b6dc-048acb0f1420
Argitis, P.
ab9c4ea6-3dd2-4e34-935d-81bfb360f358

Georgiadou, D. G., Vasilopoulou, M., Pistolis, G., Palilis, L., Dimotikali, D. and Argitis, P. (2008) Energy transfer processes among emitters dispersed in a single polymer layer for colour tuning in OLEDs. Physica Status Solidi (A) Applications and Materials Science, 205 (11), 2526-2531. (doi:10.1002/pssa.200780204).

Record type: Article

Abstract

The energy transfer processes taking place in a single polymeric layer that enable the definition of the three primary colours (red, green and blue) in selected areas via photochemically induced emission tuning are discussed. The polymers used as hosts are two wide band gap polymers, PVK and a polyfluorenyl derivative. In the polymer matrix are dispersed the green emitter, 1-(4'-dimethyl-aminophenyl)-6-phenyl-1,3,5-hexatriene (DMA-DPH), the red emitter, 4-dimethylamino-4'-nitrostilbene (DANS) and a photoacid generator (PAG). Upon irradiation, protons are released from the PAG and they react gradually with the two emitters, causing the blue shift of the green emitter fluorescence and the extinction of the red emitter fluorescence. Depending on the protonation extent, the relative concentrations of the emitters and the exposure dose the energy transfer processes occurring inside the matrix result in definition of different colour emitting areas. The understanding of the energy transfer processes with photoluminescence experiments is a necessary first step in order to rationalize the selection of suitable components enabling the definition of the three primary colours in OLEDs.

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More information

Accepted/In Press date: 17 June 2008
e-pub ahead of print date: 29 October 2008
Published date: 1 November 2008

Identifiers

Local EPrints ID: 440501
URI: http://eprints.soton.ac.uk/id/eprint/440501
ISSN: 1862-6300
PURE UUID: 2498d6eb-c1d8-4028-9b9c-d8fae15993a6
ORCID for D. G. Georgiadou: ORCID iD orcid.org/0000-0002-2620-3346

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Date deposited: 06 May 2020 16:30
Last modified: 07 Oct 2020 02:27

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Contributors

Author: M. Vasilopoulou
Author: G. Pistolis
Author: L. Palilis
Author: D. Dimotikali
Author: P. Argitis

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