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Efficient Solution Processed Hybrid White Organic Light-emitting Diodes based on a Blue Thermally Activated Delayed Fluorescence Emitter
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- Authors
- Chul Woong Joo, Gunel Huseynova, Ji Hye Kim, Jae-Min Yoo, Yong Hyun Kim, Nam Sung Cho, Jae-Hyun Lee, Yun-Hi Kim, Jonghee Lee
- Issue Date
- 2020-02
- Citation
- Thin Solid Films, v.695, pp.1-6
- ISSN
- 0040-6090
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- A solution-processed blue thermally activated delayed fluorescence (TADF) aromatic molecule has been introduced to realize high-efficiency hybrid white organic light-emitting diodes (WOLEDs) with very simple structure which contains only three organic layers of hole injection layer, emissive layer (EML), and electron transporting layer. 1,3-Bis(N-carbazolyl)benzene doped with the blue TADF molecule 10-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)-2-methylphenyl)-10H-spiro[acridine-9,9??-fluorene] was mixed with a red phosphorescent emitter, bis(2-methyldibenzo[f,h]quinoxaline) (acetylacetonate) iridium(III) to form a blue-red fluorescent-phosphorescent hybrid EML. The resultant hybrid EML was applied to construct a solution-processed WOLEDs. Hence, a maximum external quantum efficiency of 11.02% and current efficiency of 22.46 cd/A with the Commission Internationale de L'Eclairage coordinates of (0.43, 0.40) were achieved by co-doping of blue and red emitters in a single layer.
- KSP Keywords
- 6-diphenyl-1, Co-Doping, Efficient solution, External Quantum Efficiency, Hybrid EML, Organic layer, Phosphorescent emitter, Red phosphorescent, Single-layer, Solution-processed, Thermally activated delayed fluorescence emitter