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High performance OLEDs using deep red DR and near infrared NIR TADF emitters

First-generation fluorescent and second-generation phosphorescent organic light-emitting diodes (OLEDs) can achieve maximum internal quantum efficiency (IQE) of 25% and 100%, respectively. Phosphorescent OLEDs with complexes based... ver más

11/11/2022

USTAN

213K€

Presupuesto del proyecto: 213K€

Líder del proyecto

THE UNIVERSITY COURT OF THE UNIVERSITY OF ST... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2022-11-11

MSCA-IF-2019: Individual Fellowships

I+D

Cerrada hace 5 años

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No hay información privada compartida para este proyecto. Habla con el coordinador.

1 Participantes

USTAN

212.93K€ | Lider

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Duración del proyecto: 30 meses Fecha Inicio: 2020-04-21
Fecha Fin: 2022-11-11

Líder del proyecto

THE UNIVERSITY COURT OF THE UNIVERSITY OF ST... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 213K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto First-generation fluorescent and second-generation phosphorescent organic light-emitting diodes (OLEDs) can achieve maximum internal quantum efficiency (IQE) of 25% and 100%, respectively. Phosphorescent OLEDs with complexes based on iridium and platinum realize 100% IQE due to the heavy atom effect. However, there are limitations, including but not limited to their scarcity and toxicity profile. The third generation OLEDs based on a thermally activated delayed fluorescence (TADF) process can be realized in purely organic materials and produce devices with 100% IQE. So far, there are examples of high-performance blue, green and red TADF OLEDs; however, limited attention has been paid to deep red (DR) and near-infrared (NIR) TADF emitters (650-750 nm). Such DR and NIR emitters find applications in night vision displays, sensors and information-secured displays etc. Current NIR OLEDs are associated with issues related to efficiency roll-off, lifetime and purity of emission color. Most importantly, the materials contain osmium, iridium, or platinum metals and therefore these OLEDs suffer from the same issues as visible light phosphorescent counterparts. This proposal seeks to address the above issues by rational design of purely organic novel DR and NIR TADF emitters. Our design comprises of yet unexplored rigid anthrone-based strong electron acceptor decorated with suitably substituted donor carbazoles. Emission color tunability can be achieved as a function of donor choice and position and varying the strengths of either the donor or acceptor. The rigidity of the molecular components, the strengths of the acceptor/donor, the twisted conformation, and the presence of tertiary butyl groups on the carbazoles altogether will work coherently to furnish good device stability, reduced efficiency roll-off, narrow emission spectra and an improved lifetime of the OLEDs. Overall, this proposal is anticipated to provide a major breakthrough in DR and NIR TADF emitters.

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