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- Title
Deep-Blue and Hybrid-White Organic Light Emitting Diodes Based on a Twisting Carbazole-Benzofuro[2,3-b]Pyrazine Fluorescent Emitter.
- Authors
Huang, Chen-Chao; Xue, Miao-Miao; Wu, Fu-Peng; Yuan, Yi; Liao, Liang-Sheng; Fung, Man-Keung
- Abstract
A novel deep-blue fluorescent emitter was designed and synthesized. The external quantum efficiency (ηEQE) of the blue-emitting, doped, organic light-emitting diode (OLED) was as high as 4.34%. The device also exhibited an excellent color purity with Commission Internationale de l'Eclairage (CIE) coordinates of x = 0.15 and y = 0.05. In addition, the triplet energy had a value of 2.7 eV, which is rare for an emitter with deep-blue emission, which makes it a preferred choice for high-performance white OLEDs. By optimizing the device architectures, the color of hybrid-white OLEDs could be tunable from warm white to cool white using the aforementioned material as a bifunctional material. That is, the ηEQE of the hybrid warm-white OLED is 20.1% with a CIE x and y of 0.46 and 0.48 and the ηEQE of the hybrid cool-white OLED is 9% with a CIE x and y of 0.34 and 0.33.
- Subjects
ORGANIC light emitting diodes; CARBAZOLE; FLUORESCENCE; PYRAZINES; BIFUNCTIONAL catalysis
- Publication
Molecules, 2019, Vol 24, Issue 2, p353
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules24020353