Organic electroluminescent element, display device and lighting device
AssigneeKonica Minolta Holdings, Inc.
InventorsShinya Otsu, Eisaku Katoh, Tatsuo Tanaka
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Abstract
Disclosed is an organic electroluminescent device having long life, while exhibiting high luminous efficiency. Also disclosed are an illuminating device and a display, each using such an organic electroluminescent device. In the organic electroluminescent device, a compound represented by the general formula (A) which is suitable as a host material for a phosphorescent metal complex is used at least in one sublayer of a light-emitting layer.
Claims16
An organic electroluminescent element comprising a substrate having thereon at least an anode and a cathode, and a light emitting layer between the aforesaid anode and the aforesaid cathode, wherein at least one light emitting layer incorporates a compound represented by Formula (A):
- wherein A1 and A2 each represents a hydrogen atom or a substituent, provided that at least one of A1 and A2 represents a nitrogen atom containing substituent;
- X and Y each represents O, S, Se, Te, or N—R (where R represents a hydrogen atom or a substituent), providing that X is different from Y;
- L1, L2, and L3 each represents a divalent linking group;
- provided that L3 is bonded at a 2 or 3 position of a phenyl ring, n represents an integer of 1 or 2;
- n1 and n2 each represents an integer of 1 or 2;
- and n3 and n4 each represents 0 or 1.
Dependencies are inferred from the claim text.