| 摘要 |
<p>An OLED device comprises a cathode, a light emitting layer and an anode, in that order, and, has located between the cathode and the light emitting layer, a further layer containing a cyclometallated complex represented by Formula (4'), wherein: Z and the dashed arc represent two or three atoms and the bonds necessary to complete a 5-or 6-membered ring with M; M represents a Group IA, IIA, IIIA or IIB element of the Periodic Table; the remaining variables are as described in the specification; provided that the complex does not contain the 8-hydroxyquinolate ligand. Such devices exhibit reduced drive voltage.</p> |
