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Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence OLEDs exhibiting high efficiency and low roll-off
- Source :
- Chemical Communications. 55:12952-12955
- Publication Year :
- 2019
- Publisher :
- Royal Society of Chemistry (RSC), 2019.
-
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.
- Subjects :
- Materials science
010405 organic chemistry
business.industry
Doping
Metals and Alloys
General Chemistry
010402 general chemistry
01 natural sciences
Fluorescence
Luminance
Catalysis
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Characterization (materials science)
Materials Chemistry
Ceramics and Composites
OLED
Optoelectronics
Quantum efficiency
business
Host (network)
Common emitter
Subjects
Details
- ISSN :
- 1364548X and 13597345
- Volume :
- 55
- Database :
- OpenAIRE
- Journal :
- Chemical Communications
- Accession number :
- edsair.doi.dedup.....01560e2f952c4e54da6e2ad36f11a077