Organic electroluminescent device and display
View Patent ↗The present invention relates to an organic electroluminescent element and a display device exhibiting high emission efficiency and long life. The organic electroluminescent element contains a pair of electrodes having therebetween at least one constituting layer containing a phosphorescent light emitting layer, wherein one of the constituting layer contains a compound represented by Formula (1): wherein Z 1 represents an aromatic heterocylic ring which may have a substituent; Z 2 represents an aromatic heterocylic ring or an aromatic hydrocarbon ring both of which may have a substituent; Z 3 represents a divalent linking group or a single bond; and R 101 represents a hydrogen atom or a substituent.
1. An organic electroluminescent element comprising a pair of electrodes having therebetween at least one constituting layer containing a phosphorescent light emitting layer, wherein one of the constituting layers contains a compound represented by Formula (15):
wherein R 1 and R 2 each independently represents a hydrogen atom or a substituent; n and m each represents an integer of 1 to 2; k and l each represents an integer of 3 to 4, provided that n+k=5 and l+m=5; and Z 1 , Z 2 , Z 3 and Z 4 each represent a 6-membered aromatic heterocyclic ring containing a nitrogen atom;
and wherein said substituent is selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, an aromatic heterocyclic group, a heterocyclic group, an alkoxy group, a cyclo alkoxyl group, acyloxy group, alkylthio group, cycloalkylthio group, an arylthio group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfamoyl group, an acyl group, an acyloxy group, an amino group, a carbamoyl group, an ureido group, a sulfinyl group, an alkylsulfonyl group, an aryl sulfonyl group, an amino group, a halogen atom, a fluoride hydro fluoro carbon group, a cyano group, a nitro group, a hydroxyl group, a mercapto group and a silyl group.
2. The organic electroluminescent element of claim 1 , wherein the compound represented by Formula 15 has a molecular weight of 450 or more.
3. The organic electroluminescent element of claim 1 , wherein the light emitting layer contains the compound represented by Formula 15.
4. The organic electroluminescent element of claim 1 , wherein at least one of the constituting layers is a hole blocking layer and the hole blocking layer contains the compound represented by Formula 15.
5. The organic electroluminescent element of claim 1 which emits blue light.
6. The organic electroluminescent element of claim 1 which emits white light.
7. A display device having the organic electroluminescent element of claim 1 .
8. The organic electroluminescent element of claim 1 , wherein the constituting layer containing the compound represented by Formula (15) is an electron transporting layer.