Organic electroluminescent element, display device, illuminating device and condensed polycyclic heterocyclic compound
View Patent ↗Disclosed is an organic electroluminescent element which is characterized in that constituent layers including at least a phosphorescent light-emitting layer are provided between a pair of electrodes, and at least one of the constituent layers contains a compound represented by general formula (1). (In the formula, A 1 , A 2 and A 3 each represents a substituent; n1 and n2 each represents an integer of 0-3; X 1 and X 2 each represents an oxygen atom, a sulfur atom, an alkylene group, an imino group, a carbonyl group, a sulfoxide group or a sulfonyl group, or alternatively X 2 represents a bonding hand; and Z 1 , Z 2 , Z 3 and Z 4 each represents an optionally substituted aromatic heterocyclic ring or an aromatic hydrocarbon ring, provided that all of the Z 1 , Z 2 , Z 3 and Z 4 are not aromatic hydrocarbon rings at the same time.)
1. An organic electroluminescence element comprising a pair of electrodes and constituting layers which includes a phosphorescence emitting layer sandwiched between the pair of electrodes, wherein at least one of the constituting layers contains a compound represented by Formula (4):
wherein, A 1 , A 2 and A 3 each represent a substituent; n1 and n2 each represent an integer of 0 to 3; and Z 1 , Z 2 , Z 3 and Z 4 each represent an aromatic heterocycle or an aromatic hydrocarbon ring, both of which may have a substituent, and
wherein each of the Z 1 , Z 2 , Z 3 , and Z 4 is a six membered ring containing a maximum of two nitrogen atoms and at least two of the Z 1 , Z 2 , Z 3 and Z 4 contain at least one nitrogen atom.
2. The organic electroluminescence element of claim 1 , wherein Z 2 and Z 4 in Formula (4) each represent an aromatic heterocycle.
3. The organic electroluminescence element of claim 1 , wherein the phosphorescence emitting layer contains the compound represented by Formula (4).
4. The organic electroluminescence element of claim 1 , wherein the at least one of the constituting layers is a hole blocking layer and the hole blocking layer contains the compound represented by Formula (4).
5. The organic electroluminescence element of claim 1 , emitting a blue light.
6. The organic electroluminescence element of claim 1 , emitting a white light.
7. A display device comprising the organic electroluminescence element of claim 6 .
8. A lighting device comprising the organic electroluminescence element of claim 6 .
9. A display device comprising the lighting device of claim 8 and a liquid crystal element as a display means.
10. The organic electroluminescence element of claim 1 , wherein Z 1 represents a pyridine ring, Z 2 represents a phenyl ring, Z 3 represents a phenyl ring and Z4 represents a pyridine ring.