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Bipolar Host Materials Based on 1,3,5-Triazine Derivative for Green Phosphorescent Organic Light-emitting Diode
- Authors
- Song, Jung Eun; Lee, Song Eun; Song, Yeong Ran; Kim, Tae Woo; Lim, Choon Woo; Kim, Young Kwan
- Issue Date
- Sep-2017
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- Phosphorescent host; OLED; 1,3,5-triazine; Green host; Microwave-assisted Suzuki-coupling reaction
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.38, no.9, pp.1003 - 1009
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 38
- Number
- 9
- Start Page
- 1003
- End Page
- 1009
- ISSN
- 1229-5949
- Abstract
- We designed and synthesized new bipolar host materials 2-4, through microwave-assisted Suzuki-coupling reaction with 1,3,5-triazine unit and carbazole/fluorene group. The photophysical and thermal properties of the synthesized 1,3,5-triazine derivatives 2-4 were investigated by ultraviolet-visible (UV-vis) spectrometer, spectrofluorometer, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The 1,3,5-triazine derivatives 2-4 have suitable energy bandgap (E-g = 3.15-3.35 eV) and high triplet energy level (E-T, 2.63-2.87 eV) for phosphorescent green host. Device performance of 2-4 materials shows that maximum luminescence efficiency (LE) and external quantum efficiency (EQE) of green device A-C were 29.25, 49.67, and 48.74 cd/A and 8.68, 14.52, and 14.30%, respectively.
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Related Researcher
- Kim, Young Kwan
- Engineering (Applied Science)