Blue emitting internal junction organic electroluminescent devic

Details Blue emitting internal junction organic electroluminescent devic Blue emitting internal junction organic electroluminescent devic

1991-08-01

1992-09-22

Willis, Jr., Prince

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

25230116, 25230126, 546 7, H01J 163

Patent

active

051500060

ABSTRACT:
An internal junction organic electroluminescent 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 R.sup.S -8-quinolinolato ligands, where R.sup.S substitutents are chosen to block the attachment of more than two substituted 8-quinolinolato 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.

REFERENCES:
patent: 2864771 (1958-12-01), Switzer
patent: 3163530 (1964-12-01), Schlesinger
patent: 3567932 (1971-03-01), Alburger
patent: 4539507 (1985-09-01), VanSlyke et al.
patent: 4720432 (1988-01-01), VanSlyke et al.
patent: 4769292 (1988-09-01), Tang et al.
patent: 4775820 (1988-10-01), Eguchi
patent: 4885211 (1989-12-01), Tang et al.
patent: 4950950 (1990-08-01), Perry et al.
patent: 5047687 (1991-09-01), VanSlyke
patent: 5059861 (1991-10-01), Littman
patent: 5059862 (1991-10-01), VanSlyke
patent: 5061569 (1991-10-01), VanSlyke
patent: 5073446 (1991-12-01), Scozzafava
Kushi et al., "The Crystal and Molecular of Bis(2-methyl-8-quinolinolato)aluminum(III)-.mu.-oxo-bis(2-methyl-8-quinoli nolato)aluminum(III)", J. Amer. Chem. Soc., 92(1), pp. 91-96 (1970).

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