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Efficient and stable deep-blue narrow-spectrum electroluminescence based on hybridized local and charge-transfer (HLCT) state
- Source :
- Dyes and Pigments. 193:109482
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Two phenanthroimidazole-acridine derivatives (DPM and TDPM) were designed and synthesized for deep-blue organic light-emitting diode (OLED). Twisted combined rigid structures with hybridized local and charge-transfer (HLCT) state properties enable them to achieve excellent OLED performance. Non-doped OLEDs based on DPM and TDPM show decent deep-blue narrow-spectrum emission with Commission International de L’Eclairage (CIE) coordinates of (0.157, 0.053) and (0.158, 0.045), as well as maximum external quantum efficiency (EQEmax) of 4.0% and 2.6%, respectively. More importantly, OLEDs based on TDPM exhibit a smaller efficiency roll-off (12%) than that of DPM (35%) at high brightness (820 cd m−2 for DPM and 893 cd m−2 for TDPM, respectively). Overall, our work provides a molecular design strategy of HLCT materials for efficient deep-blue OLED with high color purity using purely organic emitter.
- Subjects :
- Brightness
Materials science
business.industry
Process Chemistry and Technology
General Chemical Engineering
Charge (physics)
02 engineering and technology
State (functional analysis)
Electroluminescence
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
OLED
Optoelectronics
Quantum efficiency
0210 nano-technology
business
Common emitter
Diode
Subjects
Details
- ISSN :
- 01437208
- Volume :
- 193
- Database :
- OpenAIRE
- Journal :
- Dyes and Pigments
- Accession number :
- edsair.doi...........36bdc2166b10d5a3ba960defdce46e18