Organic electroluminescent materials and devices
AssigneeUniversal Display Corporation
InventorsCHUN LIN, Bin Ma, Chuanjun Xia, Lichang Zeng, Alan Deangelis, Edward Barron
Life of this patent
Estimating the term…
Abstract
Novel heteroleptic iridium carbene complexes are provided. The complexes have lower-than expected sublimation temperatures, which is beneficial for the processing of these materials in solid state applications. Selective substitution of the ligands provides for phosphorescent compounds that are suitable for use in a variety of OLED devices. The carbene complexes can also be used as materials in a hole blocking layer and/or an electron transport layer to improve device performance.
Claims20
A first device comprising an organic light emitting device, further comprising:
- an anode;
- a cathode;
- a first layer disposed between the anode and the cathode;
- a second layer disposed between the first layer and the cathode;
- wherein the first layer is an emissive layer comprising an emissive dopant and a host;
- and
- wherein the second layer is a non-emissive layer comprising a first metal carbene complex.
Dependencies are inferred from the claim text.