Eastman-kodak Company

Global Oled Technology LLC

Shouquan Huo

Joseph C Deaton

Christopher T Brown

Marina E Kondakova

Allan Francis Sowinski

Xiaofan Ren

David W Place

Kevin P Klubek

Denis Y Kondakov

The invention provides an OLED device comprising a cathode, an anode, and having therebetween a layer containing an acridone compound including a diarylamine or carbazole substituent where the nitrogen of the acridone and the nitrogen of the diarylamine or carbazole are connected by an aromatic hydrocarbon linking group. OLED devices of the invention exhibit improved efficiency and drive voltage.

OLED device with substituted acridone compounds

An organic light emitting device contains a cathode, an anode, and has located there-between a light emitting layer, comprising co-hosts including a hole transporting compound and a particular aluminum chelate, together with at least one light emitting Iridium compound, wherein the Iridium compound is a tris C^N-cyclometallated complex with a triplet energy less than or equal to the triplet energy of each of the co-hosts.

Organic electroluminescent devices and composition

An OLED device comprises a cathode, an anode, and has therebetween a light emitting layer comprising a phosphorescent emitter represented by Formula (I):LM&#x2003;&#x2003;(I)wherein each L is a cyclometallated ligand with at least one containing a coumarin group, M is Ir or Pt, and n is 3 when M is Ir and 2 when M is Pt. The invention also comprised the compound of formula (I).

Light emitting device containing phosphorescent complex

An electroluminescent device comprises a cathode and an anode; and, located therebetween, a light-emitting layer (LEL) comprising at least one hole transporting co-host and at least one electron transporting co-host, together with at least one phosphorescent emitter, and wherein the triplet energy of each of the co-host materials is greater than the triplet energy of the phosphorescent emitter, and further containing an exciton blocking layer comprising a hole transporting material with triplet energy greater or equal to 2.5 eV adjacent the emitting layer on the anode side. The invention provides devices that emit light with high luminous efficiency at low voltage.

Phosphorescent OLEDs with exciton blocking layer

An OLED device contains a layer comprising a hole transporting compound, a certain type of oxinoid compound, and a light emitting phosphorescent compound.

Organic element for electroluminescent devices

An electroluminescent device comprises a light-emitting layer containing a light emitting material that contains an organometallic complex having a partial structure represented by the following formula (I): wherein,

Organometallic materials and electroluminescent devices

A process for forming a facial tris-cyclometallated iridium or rhodium complex isomer comprises heating an original composition containing (a) a meridional isomer of a tris-cyclometallated iridium or rhodium complex in (b) an organic hydrocarbon solvent, a halogenated hydrocarbon solvent, or a combination thereof, to a reaction temperature of least 150&#xb0; C. for a time sufficient to form a product containing the facial isomer in an increased ratio to meridional isomer compared to the original composition. The process is simple and efficient and provides improved purity.

Manufacturing process for facial tris-cyclometallated complexes

A process for forming a facial tris-cyclometallated iridium or rhodium complex isomer comprises heating an original solid composition containing meridional isomer of the metal complex at a temperature and for a time sufficient to form a product containing the facial isomer in an increased ratio to meridional isomer compared to the original composition.

Isomerization of tris-cyclometallated iridium complexes

A process for forming a facial tris-cyclometallated rhodium or iridium complex isomer from a meridional isomer comprises subjecting the meridional isomer to an isomerization reaction in the presence of an acid, an organic solvent, and silica particles.

Facial tris-cyclometallated group 9 complex synthesis

Disclosed is an electroluminescent device comprising a light-emitting layer containing a light emitting material that contains an organometallic complex comprising a metal selected from the group consisting of Pt, Pd and Ir, and a tridentate (N^C^N) ligand, wherein the tridentate (N^C^N) ligand represents a ligand that coordinates to the metal through a nitrogen donor bond, a carbon-metal bond, and a nitrogen donor bond, in that order, wherein at least one of the nitrogen donors is part of an aromatic ring or an imine group. The invention also includes a display or room lighting device employing the device of the invention and a process of emitting light from the device of the invention. The device of the invention provides good luminance efficiency.

The invention provides a process for forming an organometallic cyclometallated complex comprising the step of reacting, in an aprotic organic solvent, an organozinc complex of a desired organic ligand with a metal complex of an element of atomic number 74 to 79 bearing a leaving group.

Synthesis for organometallic cyclometallated transition metal complexes

Disclosed is an electroluminescent device comprising a cathode, an anode, and, located there between, a light emitting layer (LEL) containing a light emitting material that contains an organometallic complex comprising Pt or Pd metal and a tridentate (N&Hat;N&Hat;C) ligand, wherein the tridentate (N&Hat;N&Hat;C) ligand represents a ligand that coordinates to the metal through a nitrogen donor bond, a second nitrogen donor bond, and a carbon-metal bond, in that order, wherein at least one of the nitrogen donors is part of an aromatic ring or an imine group, and wherein the Pt or Pd atom also forms a bond to an anionic ligand group L, wherein L represents alkyl, alkenyl, aryl, or a cyano carbon, or halogen, or RX, wherein X represents a substituent that forms a bond to the Pt or Pd atom and wherein X represents N, O, S, or Se, and R represents a substituent. Such a device provides useful light emissions.

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Webster, NY, United States of America

Shouquan Huo