Electroluminescent device

Details Electroluminescent device Electroluminescent device

1991-01-22

1993-07-13

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of inorganic material

428917, 2504861, 313504, H05B 3300, H05B 3314

Patent

active

052272524

ABSTRACT:
Electroluminescent device with improved luminous efficiency, where a fluorescent emitting layer and a positive-hole transporting layer are layered on each other and arranged between a cathode and an anode, the two layers comprising organic compounds and the fluorescent emitting layer being composed of quinoline derivative as a host material, characterized by containing in the fluorescent emitting layer, as a guest material, a quinacridone compound of the following formula (A); ##STR1## wherein R.sub.1 and R.sub.2 are independently hydrogen, methyl group or chlorine or the dehydro form of the quinacridone compound.

REFERENCES:
patent: 4032226 (1977-06-01), Groner
patent: 4769292 (1988-09-01), Tang et al.
patent: 4793691 (1988-12-01), Enomoto et al.
patent: 4950950 (1990-08-01), Perry et al.

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