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Tuning the emitting color of organic light-emitting diodes through photochemically induced transformations: Towards single-layer, patterned, full-color displays and white-lighting applications

Tuning the emitting color of organic light-emitting diodes through photochemically induced transformations: Towards single-layer, patterned, full-color displays and white-lighting applications
Tuning the emitting color of organic light-emitting diodes through photochemically induced transformations: Towards single-layer, patterned, full-color displays and white-lighting applications

Photochemically induced emission tuning for the definition of pixels emitting the three primary colors, red, green, blue (RGB), in a single conducting polymeric layer is investigated. The approach proposed is based on an acid-induced emission shift of the (1-[4-(dimethylamino)phenyl]-6- phenylhexatriene) (DMA-DPH) green emitter and acid-induced quenching of the red fluorescent emitter (4-dimethylamino-4′-nitrostilbene) (DANS). The two emitters are dispersed in the wide bandgap conducting polymer poly(9-vinylcarbazole) (PVK), along with a photoacid generator (PAG). In the unexposed film areas, red emission is observed because of efficient energy transfer from PVK and DMA-DPH to DANS. Exposure of selected areas of the film at different doses results in quenching of the red emitter's fluorescence and the formation of green, blue, or even other color-emitting pixels, depending on the exposure dose and the relative concentrations of the different compounds in the film. Organic light-emitting diodes having the PVK polymer containing the appropriate amounts of DMA-DPH, DANS, and PAG as the emitting layer are fabricated and electroluminescence spectra are recorded. The time stability of induced emission spectrum changes and the color stability during device operation are also examined, and the first encouraging results are obtained.

1616-301X
3477-3485
Vasilopoulou, Maria
aad1381e-d091-4090-8c7c-b74bed22393d
Georgiadou, Dimitra
84977176-3678-4fb3-a3dd-2044a49c853b
Pistolis, George
2a710db0-c97d-44bb-8ffc-896a7cd2a087
Argitis, Panagiotis
ab9c4ea6-3dd2-4e34-935d-81bfb360f358
Vasilopoulou, Maria
aad1381e-d091-4090-8c7c-b74bed22393d
Georgiadou, Dimitra
84977176-3678-4fb3-a3dd-2044a49c853b
Pistolis, George
2a710db0-c97d-44bb-8ffc-896a7cd2a087
Argitis, Panagiotis
ab9c4ea6-3dd2-4e34-935d-81bfb360f358

Vasilopoulou, Maria, Georgiadou, Dimitra, Pistolis, George and Argitis, Panagiotis (2007) Tuning the emitting color of organic light-emitting diodes through photochemically induced transformations: Towards single-layer, patterned, full-color displays and white-lighting applications. Advanced Functional Materials, 17 (17), 3477-3485. (doi:10.1002/adfm.200700231).

Record type: Article

Abstract

Photochemically induced emission tuning for the definition of pixels emitting the three primary colors, red, green, blue (RGB), in a single conducting polymeric layer is investigated. The approach proposed is based on an acid-induced emission shift of the (1-[4-(dimethylamino)phenyl]-6- phenylhexatriene) (DMA-DPH) green emitter and acid-induced quenching of the red fluorescent emitter (4-dimethylamino-4′-nitrostilbene) (DANS). The two emitters are dispersed in the wide bandgap conducting polymer poly(9-vinylcarbazole) (PVK), along with a photoacid generator (PAG). In the unexposed film areas, red emission is observed because of efficient energy transfer from PVK and DMA-DPH to DANS. Exposure of selected areas of the film at different doses results in quenching of the red emitter's fluorescence and the formation of green, blue, or even other color-emitting pixels, depending on the exposure dose and the relative concentrations of the different compounds in the film. Organic light-emitting diodes having the PVK polymer containing the appropriate amounts of DMA-DPH, DANS, and PAG as the emitting layer are fabricated and electroluminescence spectra are recorded. The time stability of induced emission spectrum changes and the color stability during device operation are also examined, and the first encouraging results are obtained.

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More information

e-pub ahead of print date: 31 October 2007
Published date: 23 November 2007

Identifiers

Local EPrints ID: 439713
URI: http://eprints.soton.ac.uk/id/eprint/439713
ISSN: 1616-301X
PURE UUID: 02d840c6-ac47-44f6-bf94-b3ecacdd8c21
ORCID for Dimitra Georgiadou: ORCID iD orcid.org/0000-0002-2620-3346

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Date deposited: 30 Apr 2020 16:31
Last modified: 07 Oct 2020 02:27

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Contributors

Author: Maria Vasilopoulou
Author: George Pistolis
Author: Panagiotis Argitis

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