Publication details for Professor Andy MonkmanPereira, Daniel Santos, Paloma, Ward, Jonathan, Data, Pryzemyslaw, Okazaki, Youhei, Minakata, Satoshi, Bryce, Martin & Monkman, Andrew (2017). An optical and electrical study of full thermally activated delayed fluorescent white organic light emitting diodes. Scientific Reports 7: 6234.
- Publication type: Journal Article
- ISSN/ISBN: 2045-2322
- DOI: 10.1038/s41598-017-06568-3
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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.