1350752-94-1

Upstream product

• 86-74-8 9H-carbazole 
• 591-18-4 1-Bromo-3-iodobenzene 
• 1353645-94-9 9-(3-(9H-carbazole-9-yl)phenyl)-3,6-dibromo-9H-carbazole 
• 185112-61-2 9-(3-bromophenyl)carbazole 

Relevant academic research and scientific papers

This high efficiency polycarbazole compound and an organic electroluminescence element including (by machine translation)

The present invention relates to a highly efficient carbazole-based compound and to an organic electroluminescence device including the same. According to the present invention, provided are a compound for an organic electroluminescence device and an organic electroluminescence device including the compound, in which a carbazole-based phosphine oxide compound, which is a compound intended for an organic electroluminescence device, is employed to overcome the problems of conventional compounds for organic electroluminescence devices, i.e. those of instable thermal stability and low efficiency, and particularly, the compound of the present invention exhibits superior efficiency in pure-blue phosphorescent devices.

Comparison of symmetric and asymmetric bipolar type high triplet energy host materials for deep blue phosphorescent organic light-emitting diodes

Symmetric and asymmetric bipolar host materials for deep blue phosphorescent organic light-emitting diodes were developed and the chemical structure of the host materials was correlated with the device performances. The bipolar host with the asymmetric molecular structure was better than the host with symmetric molecular structure in terms of driving voltage and quantum efficiency due to better charge transport properties. A high quantum efficiency of 24.5% and a high power efficiency of 31.0 lm W-1 were achieved in the deep blue device using the asymmetric bipolar host due to balanced charge transport and low driving voltage.