Stable Blue Phosphorescent Organic Light Emitting Devices
AssigneesThe Regents of the University of Michigan, University of Southern California
InventorsStephen R. Forrest, Mark Thompson, Noel Giebink
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Abstract
Novel combination of materials and device architectures for organic light emitting devices is provided. An organic light emitting device, is provided, having an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer includes a host and a phosphorescent emissive dopant having a peak emissive wavelength less than 500 nm, and a radiative phosphorescent lifetime less than 1 microsecond. Preferably, the phosphorescent emissive dopant includes a ligand having a carbazole group.
Claims10
An organic light emitting device, comprising:
- an anode,
- a cathode,
- an emissive layer disposed between the anode and the cathode, the emissive, layer further comprising a host and a phosphorescent emissive dopant having a peak emissive wavelength less than 500 nm, and a radiative phosphorescent lifetime less than 1 microsecond.
An organic light emitting device, comprising:
- an anode,
- a cathode,
- an emissive layer disposed between the anode and the cathode, the emissive layer further comprising:
- an phosphorescent emissive dopant including a steric bulky spacer group having a size of at least 10 angstroms.
Dependencies are inferred from the claim text.