Material for luminescence element and luminescence element using the same

• US 6,528,187 B1
• Filed: 09/08/1999
• Issued: 03/04/2003
• Est. Priority Date: 09/08/1998
• Status: Expired due to Fees

• Current Assignee: UDC Ireland Limited
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Okada, Hisashi
• Primary Examiner(s): Zimmerman, John J.
• Assistant Examiner(s): XU, LING X
• Application Number:
  US09/391,156
• Time in Patent Office: 1,273 Days
• Field of Search: 428/690, 428/704, 428/917, 428/323, 428/328, 428/213, 313/504, 313/506, 252/301.16, 252/301.26, 546/112, 546/152, 546/171
• US Class Current: 428/690
• CPC Class Codes: C07D 215/40 attached in position 8
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• 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 85/146 poly N-vinylcarbazol; Derivatives thereof
• CPC Class Codes: H10K 85/30 Coordination compounds
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/326 comprising gallium
• CPC Class Codes: H10K 85/381 Metal complexes comprising a group IIB metal element, e.g. comprising cadmium, mercury or zinc
• CPC Class Codes: H10K 85/40 Organosilicon compounds, e.g. TIPS pentacene
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: Y10S 428/917 Electroluminescent
• CPC Class Codes: Y10T 428/2495 Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof

Abstract

A material for a luminescence element is described, which is a compound having a partial structure represented by the following formula (I):

wherein Q₁ represents an atomic group necessary to form a 5- or 6-membered nitrogen-containing aromatic heterocyclic ring; Q₂ represents an atomic group necessary to form a 5- or 6-membered aromatic ring; X and Y each represents a carbon atom or a nitrogen atom; and Z represents SO₂R₁, COR₂ or POR₃ (R₄) , wherein R₁, R₂, R₃ and R₄ each represents an aliphatic hydrocarbon group, an aryl group, a heterocyclic group, an amino group, an alkoxyl group, an aryloxy group or a heterocyclic oxy group.

Claims

1. A luminescence element comprising a pair of electrodes having formed therebetween a plurality of organic compound thin film layers comprising an electron-transporting layer, wherein the electron-transporting layer comprises a compound represented by the formula (K-Ie):

wherein R_e1 represents an aliphatic hydrocarbon group, an aryl group, or a heterocyclic group and each of which groups is substituted with at least one group selected from the group consisting of a halogen atom and an alkoxy group;

M represents a metal ion;

n represents an integer of from 1 to 4; and

R_a1, R_a2, R_a3, R_a4, R_a5 and R_a6 each represents a hydrogen atom or a substitutent.

2. The luminescence element of claim 1, wherein the electron-transporting layer is a layer formed by coating.

3. The luminescence element of claim 1, wherein the electron-trasnporting layer is a layer comprising a compound represented by the formula (K-Ie):

dispersed in a polymer.

4. The luminescence element of claim 1, wherein the layer containing said compound further contains at least one kind of other fluorescent compound.

5. The luminescence element of claim 1, wherein the electron-transporting layer has a film thickness of from 1 to 80 nm.

6. A material for a luminescence element, which is a compound represented by the following formula (K-Ie):

wherein R_e1 represents an aryl group or a heterocyclic group and each of which groups is substituted with at least one group selected from the group consisting of a halogen atom and an alkoxy group, M represents a metal ion;

n represents an integer of from 1 to 4; and

R_a1, R_a2, R_a3, R_a4, R_a5 and R_a6 each represents a hydrogen atom or a substitutent.

7. The material for a luminescence element as claimed in claim 6, wherein R_e1 is an aryl group.