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Highly Efficient Solution-processed Blue Organic Light-emitting Diodes based on Thermally Activated Delayed Fluorescence Emitters with Spiroacridine Donor
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- Authors
- Chul Woong Joo, Gunel Huseynova, Jiang Yifei, Jae-Min Yoo, Yong Hyun Kim, Nam Sung Cho, Jae-Hyun Lee, Yun-Hi Kim, Jonghee Lee
- Issue Date
- 2019-10
- Citation
- Journal of Industrial and Engineering Chemistry, v.78, pp.265-270
- ISSN
- 1226-086X
- Publisher
- 한국공업화학회
- Language
- English
- Type
- Journal Article
- Abstract
- High-efficiency solution-processed blue organic light-emitting diodes (OLEDs) were developed using two thermally activated delayed fluorescence (TADF) aromatic molecules, 10-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)-2,5-dimethylphenyl)-10H-spiro[acridine-9,9??-fluorene] (TXSA) and 10-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)-2-methylphenyl)-10H-spiro[acridine-9,9??-fluorene] (TTSA), composed of spiroacridine donor and triazine acceptor units. As a result, the blue devices based on two novel TADF molecules exhibited remarkable electroluminescence with a high quantum efficiency of 14.94% and current efficiency of 29.29 cd/A by optimization of emitter doping concentration and properties of the electron transporting layer. Our results demonstrate that TXSA and TTSA TADF molecules are prospective materials to fabricate high-performance solution-processed blue OLEDs with a simple device structure.
- KSP Keywords
- 6-diphenyl-1, Aromatic molecule, Blue OLEDs, Device structure, Doping concentration, Efficient solution, Fluorescence emitters, High performance, High quantum efficiency, Organic light-emitting diodes(OLEDS), Solution-processed