(Object) The present invention provides a novel phosphorescent compound by synthesizing an orthometallated complex by using easy-synthesized ligands. Further, the invention provides an electroluminescent device having high luminous efficiency by using the phosphorescent compound. Moreover, the invention...http://www.google.com/patents/US20050112400?utm_source=gb-gplus-sharePatent US20050112400 - Phosphorescence compound and electro field light emitting device having the same
Phosphorescence compound and electro field light emitting device having the same