Organic electroluminescent device
View Patent ↗An organic electroluminescent device comprising: a pair of electrode; and at least one organic layer between the pair of electrode, the at least one organic layer including a luminescent layer, wherein the luminescent layer contains at least one phosphorescent material and at least one compound represented by the formula (I) defined herein.
1. An organic electroluminescent device comprising:
a pair of electrode; and
at least one organic layer between the pair of electrode, the at least one organic layer including a luminescent layer, wherein the luminescent layer contains at least one phosphorescent material and at least one compound represented by the formula (IV):
wherein R 41 , R 42 , and R 43 each represents a hydrogen atom or an alkyl group; R 44 represents an alkyl group, an aryl group or an aromatic heterocyclic group; R 45 , R 46 , R 47 , and R 48 each represents a hydrogen atom, an alkyl group, a fluoro group or a perfluoro-substituted alkyl group; M 4 represents a divalent or trivalent metal ion; n 4 represents an integer of from 1 to 3; L 4 represents an alkoxy ion, an aryloxy ion or a silyloxy group; and m 4 represents an integer of from 0 to 2.
2. The organic electroluminescent device of claim 1 , wherein a content of the compound of the formula (IV) is from 50% to 99.9% by weight in the luminescent layer.
3. The organic electroluminescent device of claim 1 , wherein a content of the compound of the formula (IV) is from 60% to 99% by weight in the luminescent layer.
4. The organic electroluminescent device of claim 1 , wherein M 4 represents Be 2+ , Mg 2+ , Al 3+ , Zn 2+ , Ga 3+ or Cu 2+ and L 4 represents an aryloxy ion or a silyloxy group.