Organic electroluminescence device

1. An organic electroluminescence device comprising:

an anode;

one or more organic thin film layers including an emitting layer;

a donor-containing layer;

an acceptor-containing layer that transfers electrons into the donor-containing layer; and

a light-transmissive cathode in this order,

wherein the donor-containing layer comprises a compound represented by the following formulas (I) or (II):

wherein in the formulas,

R 1a to R 7a and R 1b to R 7b are independently a hydrogen atom, a substituted or unsubstituted aryl group including 6 to 60 ring carbon atoms, a substituted or unsubstituted pyridyl group, a substituted or unsubstituted quinolyl group, a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group including 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group including 7 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group including 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group including 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group including 6 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group including 2 to 50 carbon atoms, an amino group that is substituted with a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, a halogen atom, a cyano group, a nitro group, a hydroxyl group or a carboxyl group, and adjacent groups of R 1a to R 7a or adjacent groups of R 1b to R 7b may be bonded each other to form a ring;

L 1a and L 1b are independently a single bond or a linkage group;

Ar 1a and Ar 1b are independently a substituted or unsubstituted aromatic group including 6 to 60 carbon atoms; and

n is an integer of 1 to 4, and when n is 2 or more, the groups having a phenanthroline skeleton in parentheses may be the same or different from each other.

2. The organic electroluminescence device according to claim 1 , wherein the compound represented by the formula (I) or (II) is a compound represented by the following formula (I-a), (I-b), (II-a) or (II-b):

wherein in the formulas (I-a), (I-b), (II-a) or (II-b),

R 1a to R 7a and R 1b to R 7b are the same as those in the formulas (I) and (II);

R 11a to R 20a and R 11b to R 20b are independently a hydrogen atom, a substituted or unsubstituted aryl group including 6 to 60 ring carbon atoms, a substituted or unsubstituted pyridyl group, a substituted or unsubstituted quinolyl group, a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group including 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group including 7 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group including 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group including 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group including 5 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group including 2 to 50 carbon atoms, an amino group that is substituted with a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, a halogen atom, a cyano group, a nitro group, a hydroxyl group or a carboxyl group, and adjacent groups of R 1a to R 20a or adjacent groups of R 11b to R 20b may be bonded each other to form a ring; and

L 1a and L 1b are independently a single bond or a linkage group.

3. The organic electroluminescence device according to claim 1 , wherein the donor-containing layer comprises at least one of an electron-donating metal, an electron-donating metal compound and an electron-donating metal complex.

4. The organic electroluminescence device according to claim 3 , wherein the donor-containing layer comprises at least one of an alkali metal, an alkali earth metal, a simple substance of a rare earth metal, a compound of a rare earth metal and a complex of a rare earth metal.

5. The organic electroluminescence device according to claim 1 , wherein the acceptor-containing layer comprises a compound represented by the following formula (III):

wherein in the formula (III), R 1c to R 6c are independently a hydrogen atom, a substituted or unsubstituted aryl group including 6 to 60 ring carbon atoms, a substituted or unsubstituted pyridyl group, a substituted or unsubstituted quinolyl group, a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group including 3 to 50 ring carbon atoms, a substituted or unsubstituted aralkyl group including 7 to 50 ring carbon atoms, a substituted or unsubstituted alkoxy group including 1 to 50 carbon atoms, a substituted or unsubstituted aryloxy group including 6 to 50 ring carbon atoms, a substituted or unsubstituted arylthio group including 6 to 50 ring carbon atoms, a substituted or unsubstituted alkoxycarbonyl group including 2 to 50 carbon atoms, an amino group that is substituted with a substituted or unsubstituted aryl group including 6 to 50 ring carbon atoms, a halogen atom, a cyano group, a nitro group, a hydroxyl group or a carboxyl group.

6. The organic electroluminescence device according to claim 1 , wherein the acceptor-containing layer comprises a compound represented by the following formula (IV):

wherein in the formula (IV), AO is an aromatic ring including 6 to 24 ring carbon atoms, or a heterocyclic ring including 5 to 24 ring atoms, and

Rg 1 and Rg 2 may be the same or different from each other and are represented by the following formula (i) or (ii):

wherein X 1 and X 2 may be the same or different from each other and are represented by any of divalent groups represented by the following (a) to (g):

wherein R 21 to R 24 may be the same or different from each other, and are a hydrogen atom, a substituted or unsubstituted fluoroalkyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R 22 and R 23 may be bonded each other to form a ring;

R 1 to R 4 may be the same or different from each other, and a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a halogen atom, a substituted or unsubstituted fluoroalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted fluoroalkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted aralkyloxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted silyl group, or a cyano group, and R 1 and R 2 may be bonded each other to form a ring and R 3 and R 4 may be bonded each other to form a ring; and

Y 1 to Y 4 may be the same or different from each other, and are independently N, CH, or C(R 5 ), and R 5 is the same as R 1 to R 4 .

7. The organic electroluminescence device according to claim 1 , wherein the one or more organic thin film layers including the emitting layer constitute two or more emitting units that are stacked with a charge-generating layer being disposed therebetween.

8. The organic electroluminescence device according to claim 7 , wherein at least one of materials constituting the emitting units is different from a material constituting the emitting layer(s) of the other emitting unit(s).

9. The organic electroluminescence device according to claim 1 , wherein the organic electroluminescence device emits white light.

10. The organic electroluminescence device according to claim 1 , wherein L 1a and L 1b each exclude an arylene group, a pyridinylene group, a quinolinylene group, and a fluorenylene group.

11. The organic electroluminescence device according to claim 1 , wherein at least one of L 1a and L 1b is a benzene ring group.

12. The organic electroluminescence device according to claim 1 , wherein at least one of L 1a and L 1b is a naphtalene ring group.

13. The organic electroluminescence device according to claim 1 , wherein at least one of L 1a and L 1b is a methylene ring group.

14. The organic electroluminescence device according to claim 1 , wherein at least one of L 1a and L 1b is a pyridine ring group.