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Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence OLEDs exhibiting high efficiency and low roll-off
- Authors
- Godumala, Mallesham; Yoon, Jiwon; Lee, Chiho; Jeong, Ji-Eun; Park, Sungnam; Woo, Han Young; Cho, Min Ju; Choi, Dong Hoon
- Issue Date
- 7-Nov-2019
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- CHEMICAL COMMUNICATIONS, v.55, no.86, pp.12952 - 12955
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL COMMUNICATIONS
- Volume
- 55
- Number
- 86
- Start Page
- 12952
- End Page
- 12955
- ISSN
- 1359-7345
- Abstract
- This study reports the design, synthesis, and characterization of two new bipolar host materials, DCzCP and TCzCP. Both materials were implemented as hosts by doping a known green thermally activated delayed fluorescent (TADF) emitter (t4CzIPN) in solution-processable OLEDs. DCzCP-based devices afford the best performance with the maximum external quantum efficiency (EQE) of 21.2%. Notably, the EQE was maintained at 20.7% and 19.7% at a practical luminance of 500 cd m(-2) and 1000 cd m(-2), respectively, demonstrating very small roll-off.
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Related Researcher
- CHOI, DONG HOON
- College of Science (Department of Chemistry)