Organic electroluminescence device

Details Organic electroluminescence device Organic electroluminescence device

1990-03-08

1992-07-14

Willis, Jr., Prince

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

25230116, 428917, 585 25, H01J 163, C09K 1106

Patent

active

051306034

ABSTRACT:
An electroluminescence device comprising, as a light emitting material, a compound of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are each an alkyl, cyclohexyl, alkoxy, cyano or aryl, R.sup.3 and R.sup.4 are a heterocyclic or aryl and Ar is an arylene. Aromatic dimethylidyne compounds of the formula: ##STR2## wherein X and Y are each an alkyl, phenyl, cyclohexyl, naphthyl or pyridyl and Ar' is ##STR3## Electroluminescence devices (EL devices) using the above compounds as a light emitting material provide EL light emission of high luminance in a region of bluish purple to green.

REFERENCES:
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patent: 4775820 (1988-10-01), Eguchi
Takeda et al.: "Kioku, Kiroku, Kankozairyo", edited by Gakkai Shuppan-Center, Jan. 30, 1988, pp. 161 and 162, Mechanism of Electrophoto-Sensitive Material, and partial English language translation thereof.
C. W. Tang et al., "Organic Electroluminescent Diodes", Appl. Phys. Lett., 51, Sep. 21, 1987, pp. 913 to 915, 1987.
P. S. Vincett et al., "Electrical Conduction and Low Voltage Blue Electroluminescence in Vacuum-Deposited Organic Films", Thin Solid Films, 94, (1982), 174-183.
W. Helfrich et al., "Transients of Volume-Controlled Current and of Recombination Radiation in Anthracene", vol. 44, No. 8, Apr. 15, 1966, pp. 2902-2909, The Journal of Chemical Physics.

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