Organic electroluminescence device

• US 8,076,839 B2
• Filed: 05/02/2007
• Issued: 12/13/2011
• Est. Priority Date: 05/11/2006
• Status: Active Grant

• Current Assignee: Idemitsu Kosan Company Limited
• Original Assignee: Idemitsu Kosan Company Limited
• Inventors: Kuma, Hitoshi, Yamamoto, Hiroshi, Hosokawa, Chishio
• Primary Examiner(s): Ortiz, Angela
• Assistant Examiner(s): YANG, JAY
• Application Number:
  US12/300,345
• Publication Number:
  US 20090179554A1
• Time in Patent Office: 1,686 Days
• Field of Search: 428/690, 428/917, 428/411.1, 428/336, 313502-509, 257/40, 257/88, 257/104, 257/E51, 532/1, 540/1
• US Class Current: 313/504
• CPC Class Codes: C09K 2211/1011 Condensed systems
• CPC Class Codes: C09K 2211/1022 bridged by heteroatoms, e.g. N, P, Si or B
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 50/19 Tandem OLEDs
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: H10K 85/633 comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/654 comprising only nitrogen as heteroatom H10K85/652 takes precedence
• CPC Class Codes: H10K 85/657 Polycyclic condensed heteroaromatic hydrocarbons
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole

Abstract

An organic electroluminescence device (1) including: an anode (20) and a cathode (50), at least two organic emitting layers (30), (32) and (34) interposed between the anode and the cathode, and at least one intermediate connection layer (40) and (42) being provided between the organic emitting layers (30), (32) and (34), the intermediate connection layer (40) and (42) comprising an acceptor layer, a donor layer and an electron-transporting material layer being stacked in this order from the cathode (50), the electron-transporting material layer containing a non-complex compound with a nitrogen-containing heterocyclic structure.

Claims

1. An organic electroluminescence device comprising:

an anode and a cathode,

at least two organic emitting layers interposed between the anode and the cathode, and

at least one intermediate connection layer provided between the organic emitting layers,

the intermediate connection layer comprising an acceptor layer, a donor layer and an electron-transporting material layer being stacked in this order from the cathode,

the electron-transporting material layer containing a non-complex compound with a nitrogen-containing heterocyclic structure,

wherein;

the acceptor layer comprises a quinoide derivative as an acceptor, and

the donor layer comprises as a donor at least one selected from the group consisting of a donor metal, a donor metal compound, and a donor metal complex.

2. The organic electroluminescence device according to claim 1, wherein the nitrogen-containing heterocyclic structure is a nitrogen-containing five-membered heterocyclic structure.

3. The organic electroluminescence device according to claim 1, wherein the non-complex compound with a nitrogen-containing heterocyclic structure in the electron-transporting material layer is a compound represented by the following formula (1):

4. The organic electroluminescence device according to claim 1, wherein the non-complex compound with a nitrogen-containing heterocyclic structure in the electron-transporting material layer is a compound represented by the following formula (2):

5. The organic electroluminescence device according to claim 4, wherein the non-complex compound with a nitrogen-containing heterocyclic structure in the electron-transporting material layer is a compound represented by the following formula:

6. The organic electroluminescence device according to claim 1, wherein the donor metal, donor metal compound, and donor metal complex are selected from the group consisting of an alkaline metal, an alkaline earth metal, a rare earth metal, or an oxide of an alkali metal, a halide of an alkali metal, an oxide of an alkaline earth metal, a halide of an alkaline earth metal, an oxide of a rare earth metal, a halide of a rare earth metal, an organic complex of an alkali metal, an organic complex of an alkaline earth metal and an organic complex of a rare earth metal.

7. The organic electroluminescence device according to claim 1, wherein the acceptor in the acceptor layer is a quinoide derivative selected from the group consisting of compounds of formulae (1a)-(1i):

8. The organic electroluminescence device according to claim 7, wherein X has a structure represented by one of structures (j), (k), and (l).

9. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1a).

10. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1b).

11. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1c).

12. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1d).

13. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1e).

14. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1f).

15. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1g).

16. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1h).

17. The organic electroluminescence device according to claim 7, wherein the acceptor in the acceptor layer is a quinoide derivative of formula (1i).

18. The organic electroluminescence device according to claim 1, wherein the acceptor in the acceptor layer is a quinoide derivative selected from the group consisting of:

19. The organic electroluminescence device according to claim 7, wherein the donor metal is a metal having a work function of 3.8 eV or less, the donor metal compound is a compound represented by MO_x where M is a donor metal and x is 0.5 to 1.5, MF_x where M is a donor metal and x is 1 to 3, or M(CO₃)_x where M is a donor metal and x is 0.5 to 1.5, and the donor metal complex is an organic metal complex represented by the following formula (I):

20. The organic electroluminescence device according to claim 19, wherein the donor metal is selected form the group consisting of Cs, Li, Na, Sr, K, Mg, Ca, Ba, Yb, Eu and Ce.