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THF-OLED

Development of highly efficient and stable organic light-emitting diodes based on delayed fluorescent materials for solid-state lighting applications

Total Cost €

EC-Contrib. €

Partnership

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Outcomes and
results

THF-OLED project word cloud

Explore the words cloud of the THF-OLED project. It provides you a very rough idea of what is the project "THF-OLED" about.

consumption obtain phosphorescent displays alternative fabrication assistant triplet practically at realistic thf activated materials transient electron stability date durable solid flat delayed density molecule quantum emitter oled dopant mitigate thermally flexibility fluorescence electroluminescence ultimate host internal statistics uses external tadf owing applicable simplified excitation power physics eliminating till lifetime limit panel fluorescent luminescence oleds off light performance taf sources 25 lighting electrical emitting contrast excited device material el realized 100 hosted imposed pertaining organic efficiency spin diodes assisted roll matrix inherent

Project "THF-OLED" data sheet

The following table provides information about the project.

Coordinator	THE UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS Organization address address: NORTH STREET 66 COLLEGE GATE city: ST ANDREWS postcode: KY16 9AJ website: www.st-andrews.ac.uk contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.
Coordinator Country	United Kingdom [UK]
Project website	https://risweb.st-andrews.ac.uk/portal/en/projects/h2020-msca-fellowship-2016-thfoled
Total cost	183˙454 €
EC max contribution	183˙454 € (100%)
Programme	1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
Code Call	H2020-MSCA-IF-2016
Funding Scheme	MSCA-IF-EF-ST
Starting year	2017
Duration (year-month-day)	from 2017-06-01 to 2019-11-02

Partnership

Take a look of project's partnership.

#	participants	country	role	EC contrib. [€]
1	THE UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS THE UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS Organization address address: NORTH STREET 66 COLLEGE GATE city: ST ANDREWS postcode: KY16 9AJ website: www.st-andrews.ac.uk contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	UK (ST ANDREWS)	coordinator	183˙454.00

Map

Project objective

At present, OLED technology is expected to be practically applied to flat panel displays and solid state lighting sources because of its unique characteristics of low-cost processing, flexibility, and low power consumption. Till date, a large number of fluorescent and phosphorescent materials have been developed to improve the electroluminescence (EL) efficiency of OLEDs. As a result, highly durable and practically applicable OLEDs using these materials have been realized. However, the internal quantum efficiency of OLEDs based on fluorescent materials is only 25% because of the limit imposed by the electron spin-statistics under electrical excitation. In contrast, OLEDs using phosphorescent materials based on luminescence from the triplet state can achieve 100% internal quantum efficiency. Recently, an alternative realistic approach, called thermally activated delayed fluorescence (TADF), has been established to obtain ultimate 100% internal EL quantum efficiency in organic light-emitting diodes (OLEDs). But owing to rather a long transient lifetime of the triplet excited states, high efficiency roll-off and low operational stability at high current density are pertaining concerns in TADF based OLEDs. To address these challenges, the present state-of-the-art TADF-OLED technology uses a TADF molecule as an assistant dopant and a fluorescent molecule as an end emitter in a host matrix, called TADF assisted fluorescence (TAF-OLED). However, TAF-OLED approach has several inherent technical challenges associated with device physics, fabrication and cost. Through this research proposal we present a more simplified and realistic approach, called TADF hosted fluorescence (THF), to enhance the performance and operational stability by using TADF material as host material and fluorescent molecule as end emitter eliminating the need of external host matrix thus mitigate the technical issues associated with TAF-OLEDs.

Publications

List of publications.
year	authors and title	journal	last update
2019	Jong Uk Kim, Michael Y. Wong, Shiv Kumar, Oliver G. Hayes, Finlay Duncan, Chin-Yiu Chan, Ben Yiu-Wing Wong, Hao Ye, Lin-Song Cui, Hajime Nakanotani, Eli Zysman-Colman, Chihaya Adachi High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off published pages: 1225-1228, ISSN: 0366-7022, DOI: 10.1246/cl.190412	Chemistry Letters 48/10	2020-03-23

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