ORGANIC ELECTROLUMINESCENT DEVICE

• US 20080241589A1
• Filed: 03/26/2008
• Published: 10/02/2008
• Est. Priority Date: 03/26/2007
• Status: Abandoned Application

• Current Assignee: UDC Ireland Limited
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: ISE, Toshihiro, FUKUNAGA, Hirofumi
• Application Number:
  US12/055,473
• Publication Number:
  US 20080241589A1
• Time in Patent Office: Days
• US Class Current: 428/690
• CPC Class Codes: C07F 15/0033 Iridium compounds
• CPC Class Codes: C07F 15/0086 Platinum compounds
• CPC Class Codes: C07F 9/5027 Polyphosphines
• CPC Class Codes: C07F 9/5329 Polyphosphine oxides or thioxides
• CPC Class Codes: C07F 9/58 Pyridine rings
• CPC Class Codes: C07F 9/650952 having the nitrogen atoms in the positions 1 and 4
• CPC Class Codes: C07F 9/6512 having the nitrogen atoms in positions 1 and 3
• CPC Class Codes: C07F 9/65128 condensed with carbocyclic rings or carbocyclic ring systems
• CPC Class Codes: C07F 9/6521 Six-membered rings
• CPC Class Codes: C07F 9/655345 the sulfur atom being part of a five-membered ring
• CPC Class Codes: C07F 9/65583 each of the hetero rings containing nitrogen as ring hetero atom
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1033 with oxygen
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1059 containing three nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1088 containing oxygen as the only heteroatom
• CPC Class Codes: C09K 2211/1092 containing sulfur as the only heteroatom
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: H05B 33/18 characterised by the nature or concentration of the activator
• CPC Class Codes: H05B 33/20 : characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
• CPC Class Codes: H05B 33/22 : characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
• CPC Class Codes: H10K 2101/10 : Triplet emission
• CPC Class Codes: H10K 50/11 : characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/14 : Carrier transporting layers
• CPC Class Codes: H10K 50/18 : Carrier blocking layers
• CPC Class Codes: H10K 85/346 : comprising platinum
• CPC Class Codes: H10K 85/654 : comprising only nitrogen as heteroatom H10K85/652 takes precedence

Abstract

An organic electroluminescent device is provided and includes: a pair of electrodes; and an organic compound layer between the pair of electrodes, the organic compound layer including a light-emitting layer. The at least one organic compound layer contains at least one of a compound represent by formula (I) and a compound represented by formula (II).

Claims

1. An organic electroluminescent device comprising:

a pair of electrodes; and

an organic compound layer between the pair of electrodes, the organic compound layer including a light-emitting layer,

wherein the at least one organic compound layer contains at least one of a compound represent by formula (I) and a compound represented by formula (II);

2. The organic electroluminescent device according to claim 1, wherein each of the compound represented by formula (I) and a compound represented by formula (II) has a glass transition temperature of from 130 to 450°

C.

3. The organic electroluminescent device according to claim 1, wherein the each of the compound represented by formula (I) and the compound represented by formula (II) has an energy level in the lowest triplet excited state of from 65 to 95 kcal/mol.

4. The organic electroluminescent device according to claim 1, wherein the at least one organic compound layer contains a light-emitting material, and the light-emitting material contains a phosphorescent material.

5. The organic electroluminescent device according to claim 4, wherein the phosphorescent material is an iridium complex or a platinum complex.

6. The organic electroluminescent device according to claim 5, wherein the phosphorescent material is a platinum complex having a tetradentate ligand.

7. The organic electroluminescent device according to claim 6, wherein the platinum complex having a tetradentate ligand is represented by formula (C-1):

8. The organic electroluminescent device according to claim 7, wherein the platinum complex having a tetradentate ligand is represented by one of formulae (A), (B), (E) and (F):

9. The organic electroluminescent device according to claim 1, wherein the at least one of the compound represented by formula (I) and the compound represented by formula (II) is contained in the light-emitting layer.

10. The organic electroluminescent device according to claim 1, wherein the at least one organic compound layer includes a layer containing the at least one of the compound represented by formula (I) and the compound represented by formula (II), the layer being between the light-emitting layer and a cathode.

11. The organic electroluminescent device according to claim 1, wherein the at least one organic compound layer includes an electron transporting layer, and the at least one of the compound represented by formula (I) and the compound represented by formula (II) is contained in the electron transporting layer.

12. The organic electroluminescent device according to claim 1, wherein the at least one organic compound layer includes:

a first layer containing the at least one of the compound represented by formula (I) and the compound represented by formula (II), the first layer being between the light-emitting layer and a cathode; and

a second layer between the first layer and the light-emitting layer.

13. A compound represented by formula (I):

14. A compound represented by formula (II):