Phosphorescent emitters and host materials with improved stability

• US 8,586,204 B2
• Filed: 08/26/2010
• Issued: 11/19/2013
• Est. Priority Date: 12/28/2007
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Xia, Chuanjun, Yeager, Walter, Ma, Bin, Beers, Scott, Tsai, Jui-Yi, Fiordeliso, James, Barron, Edward, Lin, Chun
• Primary Examiner(s): YAMNITZKY, MARIE ROSE
• Application Number:
  US12/869,284
• Publication Number:
  US 20110057559A1
• Time in Patent Office: 1,181 Days
• Field of Search: None
• US Class Current: 428/690
• CPC Class Codes: C07F 15/0033 Iridium compounds
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1088 containing oxygen 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 33/14 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 2101/10 Triplet emission
• 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 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: H10K 85/6576 comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

Devices containing a particular combination of organic compounds are provided. In particular, the devices contain twisted aryl compounds having extended conjugation (i.e., the twisted aryl is substituted with an additional aryl group) in combination with dibenzothiophene or dibenzofuran containing host materials. The organic light emitting devices may provide improved stability color, lifetime and manufacturing. Compounds containing a twisted aryl having extended conjugation are also provided.

Claims

1. A first device comprising an organic light emitting device, comprising:

an anode;

a cathode; and

an organic layer, disposed between the anode and the cathode, the organic layer comprising;

2. The device of claim 1, wherein the organic layer is an emissive layer and compound 1 is an emitting dopant and Compound H1 is a host material.

3. The device of claim 1, wherein the first device is a display.

4. The device of claim 1, wherein the first device is an organic light emitting device.