- Highly efficient triazine/carbazole-based host material for green phosphorescent organic light-emitting diodes with low efficiency roll-off
-
Two novel host materials, 3-(dibenzo[b,d]furan-4-yl)-9-(4,6-diphenyl-1,3,5-triazin-2-yl)-9H-carbazole (BFTC) and 3-(dibenzo[b,d]thiophen-4-yl)-9-(4,6-diphenyl-1,3,5-triazin-2-yl)-9H-carbazole (BTTC) were designed and synthesized. These two compounds exhibited excellent physical properties with high thermal stabilities and reasonable HOMO-LUMO energy levels. Both of them were applied to fabricate green phosphorescent organic light emitting devices (PhOLEDs) as host materials, and the BTTC based device demonstrated outstanding electroluminescence performance with a maximum current efficiency, maximum power efficiency and external quantum efficiency of 69.3 cd A-1, 54.2 lm W-1 and 21.9%, respectively, suggesting that BTTC is a promising host for green PhOLEDs.
- Hu, Mingming,Liu, Yang,Chen, Yi,Song, Wenxuan,Gao, Lei,Mu, Haichuan,Huang, Jinhai,Su, Jianhua
-
-
Read Online
- Compounds applied to field of OLEDs (organic light-emitting diodes)
-
The invention provides compounds applied to the field of OLEDs (organic light-emitting diodes). The invention is characterized in that the structure is disclosed as general formula (I), wherein Y is the S or O element, X1 and X2 are respectively independently N or C, and R is aromatic compounds. The compounds are carbazole-bibenzothiophene/furan-structure derivative compounds, and can be applied into electronic transmission layers, luminescent layers and hole transmission layers of OLEDs and especially preferably in red-light main body materials, green-light main body materials and hole transmission materials to finally obtain an OLED device with better properties.
- -
-
Paragraph 0042-0047
(2017/04/22)
-
- Organic electroluminescent device employing organic light emitting compound as light emitting material
-
Provided is an organic electroluminescent device that exhibits an efficient host-dopant energy transfer mechanism, and thus, expresses a certain high-efficiency electroluminescent performance, based on improved electron density distribution. The organic electroluminescent device also overcomes low initial efficiency and short operation life property, and secures high-performance electroluminescent performance with high efficiency and long life property for each color.
- -
-
Paragraph 0086
(2015/04/15)
-