| abstract |
Disclosed is an electroluminescent device comprising a lightÂemitting layer containing a light emitting phosphorescent material that contains an organometallic complex comprising a metal selected from the group consisting of Mo, W, Re, Ru, and Os that is coordinated to a neutral or negatively-charged ligand group through the i electrons of the ligand with a hapticity greater than 2. The device provides useful light emissions. |