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

Pereira, DS and Dos, Santos PL and Ward, JS and Data, P and Okazaki, M and Takeda, Y and Minakata, S and Bryce, MR and Monkman, AP (2017) An optical and electrical study of full thermally activated delayed fluorescent white organic light-emitting diodes. Scientific Reports, 7: 6234. ISSN 2045-2322

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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.

Item Type:
Journal Article
Journal or Publication Title:
Scientific Reports
Uncontrolled Keywords:
Research Output Funding/yes_externally_funded
Subjects:
?? yes - externally fundedgeneral ??
ID Code:
193710
Deposited By:
Deposited On:
16 May 2023 14:20
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2024 23:49