Organometallic complexes with built-in fluorescent dyes for use in light emitting devices

• US 5,552,547 A
• Filed: 02/13/1995
• Issued: 09/03/1996
• Est. Priority Date: 02/13/1995
• Status: Expired due to Term

• Current Assignee: Universal Display Corporation
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Shi, Song Q.
• Primary Examiner(s): NAZARIO GONZALEZ, PORFIRIO
• Application Number:
  US08/387,691
• Time in Patent Office: 568 Days
• Field of Search: 556/1, 556/176, 556/7, 548/101
• US Class Current: 546/7
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/30 Coordination compounds
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/621 Aromatic anhydride or imide compounds, e.g. perylene tetra-carboxylic dianhydride or perylene tetracarboxylic di-imide
• CPC Class Codes: H10K 85/622 containing four rings, e.g. pyrene
• CPC Class Codes: H10K 85/623 containing five rings, e.g. pentacene
• 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

A new class of organometallic complexes with built-in fluorescent dye for use in electroluminescent (EL) devices and a method of preparation are disclosed. An organometallic complex with built-in fluorescent dye as guest dopant is introduced into an organic EL device by thoroughly pre-mixing it with a host organometallic emitter in a certain ratio and co-depositing it from a single source. The organometallic complex with built-in fluorescent dye determines the emission color of the EL device.

Claims

1. An organometallic complex with a built-in fluorescent dye having a general formula:

##STR9## where;

M is a trivalent metal ion;

O represents oxygen atom;

L3 is a fluorescent molecule dye;

L1 and L2 are independently selected from one of the molecules having a general formula I or II or III as shown in the following;

##STR10## Where;

X represents O, NH and CH₂ ;

R1 to R8 represent substitution possibilities at each position and each represent hydrogen or hydrocarbon groups or functional groups selected from cyano, halogen, haloalkyl, haloalkoxy, alkoxyl, amido, amino, sulfonyl, carbonyl, carbonyloxy and oxycarbonyl;

R10 represents a hydrocarbon group or a functional group such as cyano, halogen, haloalkyl, haloalkoxy, alkoxyl, amido, amino, sulfonyl, carbonyl, carbonyloxy and oxycarbonyl.

2. An organometallic complex with a built-in fluorescent dye as claimed in claim 1 wherein M is a trivalent metal selected from the following group:

Al⁺³, Ga⁺³, and In⁺³.

3. An organometallic complex with a built-in fluorescent dye as claimed in claim 1 including:

##STR11##