Abstract:

Bipolar hosts are the key point to improve the luminous efficiency of electroluminescent device. One novel type of structural classification method is put forward according to the structural construction principle of the bipolar hosts in this article. The main patent technology in recent years is reviewed through the main line of the structure characteristics and evolution of the bipolar hosts in this area. The primary concepts in structure design of these materials are extracted and summarized. At last the prospect of this field is presented.

Key words: bipolar hosts, structure characteristics, orgainc electroluminescent devices, patent technology