Organic electroluminescent device, display, and illuminating device
An organic electroluminescent element including at least an emission layer sandwiched between an anode and a cathode, wherein the emission layer comprises at least a compound represented by Formula (A),
1. An organic electroluminescent element comprising at least an emission layer sandwiched between an anode and a cathode,
wherein the emission layer comprises at least a compound represented by Formula (A),
wherein X represents O or S and Y represents O, S or N—R (R represents a hydrogen atom or a substituent); A 1 and A 2 each represent a hydrogen atom or a substituent and at least one of A 1 and A 2 is a substituent; L 1 and L 2 each represent a divalent linking group; n is an integer of 1 or more; n1 and n2 each are an integer of 1 or more; n3 and n4 each are 0 or 1; provided that n1+n2≧2, wherein X and Y are different.
2. The organic electroluminescent element of claim 1 , wherein the compound represented by Formula (A) is further represented by Formula (2),
wherein X represents O or S and Y represents O, S or N—R (R represents a hydrogen atom or a substituent); n1, n2 and n represent an integer of 1 or more; A 1 and A 2 each represent a hydrogen atom or a substituent; and at least one of A 1 and A 2 is a substituent.
3. The organic electroluminescent element of claim 2 , wherein n is an integer of 1 to 5.
4. The organic electroluminescent element of claim 2 , wherein n is an integer of 1 or 2.
5. The organic electroluminescent element of claim 1 , wherein at least one of A 1 and A 2 incorporate a substituent having a nitrogen atom.
6. The organic electro luminescent element of claim 5 , wherein the substituent having the nitrogen atom is a carbazolyl group.
7. The organic electroluminescent element of claim 5 , wherein the substituent having the nitrogen atom is a carbolinyl group.
8. The organic electro luminescent element of claim 5 , wherein the substituent having the nitrogen atom is a diarylamino group.
9. The organic electroluminescent element of claim 1 , wherein X is an oxygen atom.
10. The organic electroluminescent element of claim 1 , wherein the emission layer incorporates a phosphorescence-emitting metal complex.
11. The organic electroluminescent element of claim 10 , wherein the phosphorescence-emitting metal complex is an Ir complex.
12. The organic electroluminescent element of claim 1 , generating emission of white color.
13. A display, comprising the organic electroluminescent element described in claim 1 .
14. A lighting device comprising the organic electroluminescent element described in claim 1 .