H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 33/00 (2006.01) C07F 5/06 (2006.01) C09K 11/06 (2006.01) H05B 33/14 (2006.01)
Patent
CA 2074920
An internal junction organic electrolumines- cent device is disclosed comprised of, in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode. The organic electron injecting and transporting zone is comprised of an electron injecting layer in contact with the cathode and, interposed between the electron injecting layer and the organic hole injecting and transporting zone, a blue emitting luminescent layer comprised of an aluminum chelate containing a phenolato ligand and two Rs-8-quinolino- lato ligands, where Rs substituents are chosen to block the attachment of more than two substituted 8-quino- linolato ligands to the aluminum atom. The presence of the phenolato ligand shifts device emission to the blue region of the spectrum and increases emission efficiency. Device emission is shifted to even shorter blue wavelengths and increased operating stability can be realized by the incorporation of a pentacarbocyclic aromatic fluorescent dye.
Bryan Philip Steven
Lovecchio Frank Vito
Vanslyke Steven Arland
Bryan Philip Steven
Eastman Kodak Company
Gowling Lafleur Henderson Llp
Lovecchio Frank Vito
Vanslyke Steven Arland
LandOfFree
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