Organic electroluminescent materials and devices

• US 9,670,404 B2
• Filed: 07/06/2012
• Issued: 06/06/2017
• Est. Priority Date: 06/06/2012
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: DeAngelis, Alan, Xia, Chuanjun, Ma, Bin
• Primary Examiner(s): YAMNITZKY, MARIE ROSE
• Application Number:
  US13/542,868
• Publication Number:
  US 20130328019A1
• Time in Patent Office: 1,796 Days
• Field of Search: None
• CPC Class Codes: C07F 15/0033 Iridium compounds
• 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 2211/1044 containing two nitrogen atoms as heteroatoms
• 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 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/346 comprising platinum

Abstract

Compounds comprising the formula L₁L₂MX wherein L₁, L₂, and X are distinct bidentate ligands that form an octahedral complex on the metal M, wherein M is a metal with an atomic weight greater than 40. Compounds of this formula are sublimated more facilely than octahedral metal complexes where L₁, L₂, and X are not distinct bidentate ligands. Organic light emitting devices are also described wherein the emissive layer may comprise a host material containing an emissive molecule of formula L₁L₂MX, which molecule is adapted to luminesce when a voltage is applied across the heterostructure, and the emissive molecule is selected from the group of phosphorescent organometallic complexes, including iridium complexes of the formula L₁L₂IrX wherein L₁, L₂, and X are distinct bidentate ligands.

Claims

1. A compound having the Formula:

L₁L₂MX, 

 

Formula I;

wherein M is a metal having an atomic weight higher than 40;

wherein L₁ is a ligand selected from the group consisting of Formula II, Formula III, and Formula IV;

2. The compound of claim 1, wherein the compound is selected from the group consisting of:

3. A compound selected from the group consisting of:

4. A first device comprising a first organic light emitting device, comprising:

an anode;

a cathode; and

an organic layer, disposed between the anode and the cathode, comprising a compound selected from the group consisting of;

5. The first device of claim 4, wherein the organic layer further comprises a host.

6. The first device of claim 5, wherein the host comprises a metal 8-hydroxyquinolate complex.

7. The first device of claim 5, wherein the host is selected from the group consisting of:

8. The first device of claim 4, wherein the first device is selected from the group consisting of a consumer product, an organic light-emitting device, a lighting panel, and a combination thereof.

9. The first device of claim 4, wherein the compound is selected from the group consisting of:

10. The first device of claim 4, wherein the compound is selected from the group consisting of:

11. The first device of claim 4, wherein the compound has the structure of Formula I.