Dibenzothiophene-containing materials in phosphorescent light emitting diodes

• US 9,123,903 B2
• Filed: 09/13/2013
• Issued: 09/01/2015
• Est. Priority Date: 12/28/2007
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Lin, Chun, Dyatkin, Alexey, Elshenawy, Zeinab, Yeager, Walter
• Primary Examiner(s): CLARK, GREGORY D
• Application Number:
  US14/026,868
• Publication Number:
  US 20140008643A1
• Time in Patent Office: 718 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: C07D 209/86 with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
• CPC Class Codes: C07D 235/18 with aryl radicals directly attached in position 2
• CPC Class Codes: C07D 235/20 Two benzimidazolyl-2 radicals linked together directly or via a hydrocarbon or substituted hydrocarbon radical
• CPC Class Codes: C07D 333/76 Dibenzothiophenes
• CPC Class Codes: C07D 405/14 containing three or more hetero rings
• CPC Class Codes: C07D 409/10 linked by a carbon chain containing aromatic rings
• CPC Class Codes: C07D 409/14 containing three or more hetero rings
• CPC Class Codes: C07D 413/10 linked by a carbon chain containing aromatic rings
• CPC Class Codes: C07D 471/04 Ortho-condensed systems
• CPC Class Codes: C07D 487/04 Ortho-condensed systems
• CPC Class Codes: C07F 5/027 Organoboranes and organoborohydrides
• CPC Class Codes: C07F 7/0814 said ring is substituted at a C ring atom by Si
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• 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 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• 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 85/654 : comprising only nitrogen as heteroatom H10K85/652 takes precedence
• 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
• CPC Class Codes: H10K 85/6576 : comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

An organic light emitting device that includes an anode, a cathode, an enhancement layer, and an emissive layer that includes homoleptic iridium complexes containing phenyl-imidazole ligands, which include at least one fused substituent. The enhancement layer also includes a new dibenzothiophene and dibenzofuran-containing compound that is useful as a material in an enhancement layer.

Claims

1. An organic light emitting device, comprising:

an anode;

a cathode;

an emissive layer; and

an enhancement layer, wherein

2. The device of claim 1, wherein R₂ and R₃ form a fused ring that is, optionally, further substituted.

3. The device of claim 2, wherein the emissive dopant comprises:

4. The device of claim 2, wherein the emissive dopant comprises:

5. The device of claim 1, wherein the emissive layer comprises H1 as a host.

6. The device of claim 1, wherein the enhancement layer is a hole blocking layer.