Organic electroluminescent element and display
View Patent ↗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 of 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 and an electron transporting layer,
wherein said electron transporting layer contains a compound represented by Formula (1-11):
wherein Z 1 represents an aromatic heterocylic ring which is a pyridine ring and may have a substituent; Z 2 represents an aromatic heterocylic ring which is a pyridine ring and may have a substituent or an aromatic hydrocarbon ring which is 6-membered ring and may have a substituent; Z 3 represents a single bond; L represents a divalent linking group including one of a alkylene group, a cycloalkylene group, an arylene group and an aromatic heterocyclic group, each of which may have a substituent; and the two groups linked by L may be the same or different from each other.
2. The organic electroluminescent element of claim 1 , wherein the compound represented by Formula (1-11) 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 (1-11).
4. The organic electroluminescent element of claim 1 , wherein the electron transporting layer comprises a hole blocking layer and the hole blocking layer contains the compound represented by Formula (1-11).
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. An organic electroluminescent element comprising a pair of electrodes having therebetween at least one constituting layer containing a phosphorescent light emitting layer and an electron transporting layer,
wherein the electron transporting layer contains a compound represented by Formula (1-12):
wherein R 102 represents an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an aryl group which may have a substituent or a heterocyclic group which may have a substituent; Z 4 and Z 5 each independently represents a pyridine ring; and Z 3 represents a single bond.
9. The organic electroluminescent element of claim 8 , wherein the compound represented by Formula (1-12) has a molecular weight of 450 or more.
10. The organic electroluminescent element of claim 8 , wherein the light emitting layer contains the compound represented by Formula (1-12).
11. The organic electroluminescent element of claim 8 , wherein the electron transporting layer comprises a hole blocking layer and the hole blocking layer contains the compound represented by Formula (1-12).
12. The organic electroluminescent element of claim 8 which emits blue light.
13. The organic electroluminescent element of claim 8 which emits white light.
14. A display device having the organic electroluminescent element of claim 8 .
15. The organic electroluminescent element of claim 8 , wherein the compound represented by Formula (1-11) is a compound represented by Formula (1-13):
wherein R 103 represents an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an aryl group which may have a substituent or a heterocyclic group which may have a substituent; R 104 represents a hydrogen atom or a substituent; and Z 6 and Z 7 each independently represents a pyridine ring.
16. The organic electroluminescent element of claim 15 , wherein the compound represented by Formula (1-13) has a molecular weight of 450 or more.
17. The organic electroluminescent element of claim 15 , wherein the light emitting layer contains the compound represented by Formula (1-13).
18. The organic electroluminescent element of claim 15 , wherein at least one of the constituting layers is a hole blocking layer and the hole blocking layer contains the compound represented by Formula (1-13).