Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 78, Issue -, Pages 265-270Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2019.06.003
Keywords
OLED; Blue emission; TADF; Solution-Processed devices; Spiroacridine
Funding
- National Research Foundation of Korea (NRF) - Ministry of Education [2018R1A6A1A03026005, 2018R1A2A1A05078734]
- Institute for Information & communications Technology Promotion (IITP) - Ministry of Science and ICT (MSIT) [2018-0-00202]
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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. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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