OLEDs doped with phosphorescent compounds

• US 20080024058A1
• Filed: 07/23/2007
• Published: 01/31/2008
• Est. Priority Date: 12/01/1997
• Status: Active Grant

• Current Assignee: Andrei Shoustikov, Mark Thompson, Paul Burrows, Scott Sibley, Stephen Forrest, Yujian You
• Original Assignee: Andrei Shoustikov, Mark Thompson, Paul Burrows, Scott Sibley, Stephen Forrest, Yujian You
• Inventors: Burrows, Paul, Sibley, Scott, Forrest, Stephen, Thompson, Mark, You, Yujian, Shoustikov, Andrei
• Granted Patent: US 7,563,519 B2
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: C07D 487/22 in which the condensed system contains four or more hetero rings
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/10 Non-macromolecular compounds
• CPC Class Codes: C09K 2211/1003 Carbocyclic compounds
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1018 Heterocyclic compounds
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1033 with oxygen
• CPC Class Codes: C09K 2211/1074 containing more than three nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/18 Metal complexes
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: C09K 2211/186 of the light metals other than alkali metals and alkaline earth metals, i.e. Be, Al or Mg
• 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: H05B 33/28 of translucent electrodes
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• CPC Class Codes: H10K 2102/3031 Two-side emission, e.g. transparent OLEDs [TOLED]
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 50/828 Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 59/80524 : Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 85/30 : Coordination compounds
• CPC Class Codes: H10K 85/324 : comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/341 : Transition metal complexes, e.g. Ru(II)polypyridine complexes H10K85/331 takes precedence
• CPC Class Codes: H10K 85/346 : comprising platinum
• 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 85/654 : comprising only nitrogen as heteroatom H10K85/652 takes precedence
• CPC Class Codes: Y10S 428/917 : Electroluminescent
• CPC Class Codes: Y10T 428/24942 : including components having same physical characteristic in differing degree

Abstract

Organic light emitting devices are Disclosed which are comprised of a heterostructure for producing electroluminescence wherein the heterostructure is comprised of an emissive layer containing a phosphorescent dopant compound. For example, the phosphorescent dopant compound may be comprised of platinum octaethylporphine (PtOEP), which is a compound having the chemical structure with the formula:

Claims

1-20. -20. (canceled)

21. An organic light emitting device comprising an anode, a cathode and an emissive layer, wherein the emissive layer is located between the anode and the cathode and the emissive layer comprises a phosphorescent dopant material and a charge-carrying host material, wherein the phosphorescent dopant material emits phosphorescent radiation from a triplet molecular excited state when a voltage is applied across the organic light emitting device at room temperature, and wherein the organic light emitting device is capable of an external quantum efficiency of 0.07% for the emission of the phosphorescent radiation.

26. An organic light emitting device comprising, in sequence, an anode, a hole transporting layer, an emissive layer, an electron transporting layer, and a cathode, wherein the emissive layer comprises a phosphorescent dopant material and a charge-carrying host material, wherein the phosphorescent dopant material emits phosphorescent radiation from a triplet molecular excited state when a voltage is applied across the organic light emitting device at room temperature, and wherein the organic light emitting device is capable of producing an external quantum efficiency of 0.07% for the emission of the phosphorescent radiation.