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US 2024/0196729 A1Published application
Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsTyler FLEETHAM, Hsiao-Fan CHEN, Jerald FELDMAN
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Abstract
Provided is a new composition of matter for phosphorescent emitters containing a chelating ligand including five or more fused carbocyclic or heterocyclic rings that form two bonds to a metal forming a 7-membered chelate. This fused ring structure provides added rigidity to the molecule for enhanced stability in an OLED device and improve photophysical properties.
Claims18
An organic light emitting device (OLED) comprising:
- an anode;
- a cathode;
- and
- an organic layer disposed between the anode and the cathode;
- wherein the organic layer comprises a first compound as an emitter;
- wherein the first compound is selected from the group consisting of phosphorescent emitter and delayed fluorescent emitter;
- wherein the device emits a luminescent radiation at room temperature when a voltage is applied across the device;
- wherein the luminescent radiation comprises a first radiation component emitted from the first compound;
- and
- wherein the first radiation component has a full width at half maximum equal to or less than 15 nm.
7 more elements
Dependencies are inferred from the claim text.