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An optical and electrical study of full thermally activated delayed fluorescent white organic light emitting diodes

Pereira, Daniel; Santos, Paloma; Ward, Jonathan; Data, Pryzemyslaw; Okazaki, Youhei; Minakata, Satoshi; Bryce, Martin; Monkman, Andrew

An optical and electrical study of full thermally activated delayed fluorescent white organic light emitting diodes Thumbnail


Authors

Daniel Pereira

Paloma Santos

Jonathan Ward

Pryzemyslaw Data

Youhei Okazaki

Satoshi Minakata

Martin Bryce



Abstract

We report on the engineering of full thermally activated delayed fluorescence – based white organic light emitting diodes (W-OLEDs) composed of three emitters (2,7-bis(9,9-dimethyl-acridin-10-yl)-9,9-dimethylthioxanthene-S,S-dioxide (DDMA-TXO2), 2,7-bis(phenoxazin-10-yl)-9,9-dimethylthioxanthene-S,S-dioxide (DPO-TXO2) and 3,11-di(10H-phenoxazin-10-yl)dibenzo[a,j]phenazine (POZ-DBPHZ) in two different hosts. By controlling the device design through the study of the emission of DDMA-TXO2 and DPO-TXO2, the behaviour of POZ-DBPHZ in a device with more than one emitter, and the combination of the three materials, respectively, we show that external quantum efficiencies as high as 16% can be obtained for a structure with a correlated colour temperature close to warm white, together with colour rendering index close to 80. However it is in their performance stability that provides the true breakthrough: at 1000 cd/m2 the efficiencies were still above 10%, which is one of the best for this type of devices.

Citation

Pereira, D., Santos, P., Ward, J., Data, P., Okazaki, Y., Minakata, S., Bryce, M., & Monkman, A. (2017). An optical and electrical study of full thermally activated delayed fluorescent white organic light emitting diodes. Scientific Reports, 7(1), Article 6234. https://doi.org/10.1038/s41598-017-06568-3

Journal Article Type Article
Acceptance Date May 24, 2017
Online Publication Date Jul 24, 2017
Publication Date Jul 24, 2017
Deposit Date Jun 2, 2017
Publicly Available Date Jul 25, 2017
Journal Scientific Reports
Electronic ISSN 2045-2322
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 7
Issue 1
Article Number 6234
DOI https://doi.org/10.1038/s41598-017-06568-3
Public URL https://durham-repository.worktribe.com/output/1357819

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.






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