Organic electroluminescence device
AssigneeIdemitsu Kosan Co., Ltd.
InventorsHiroshi Tokailin, Hisahiro Higashi, Chishio Hosokawa
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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.
Claims32
An electroluminescence device comprising a light emitting material placed between a pair of electrodes, wherein the light emitting material comprises a compound represented by the formula:
- ##STR53## wherein R.sup.1 and R.sup.2 are each an alkyl group, an unsubstituted cyclohexyl group;
- a cyclohexyl group substituted by at least one substituent selected from the group consisting of an alkyl group, an alkoxy group, or a phenyl group;
- an alkoxy group;
- a cyano group;
- an unsubstituted aryl group;
- an aryl group substituted with at least one substituent (a) selected from the group consisting of an alkyl group, an alkoxy group, an acyl group, an acyloxy group, an acyl amino group, an aralkyl group, an aryloxy group, a cyano group, a carboxyl group, a vinyl group, a styryl group, an aminocarbonyl group, an aryloxycarbonyl group, a hydroxyl group, an alkoxycarbonyl group, a halogen group and an amino group, wherein the substituents together may form a 5-membered or 6-members ring;
- R.sup.3 and R.sup.4 are each an unsubstituted heterocyclic group, a heterocyclic group substituted by at least one substituent (a) as defined above, an unsubstituted aryl group or aryl group substituted by at least one substituent (a) as defined above, Ar is an unsubstituted arylene group or an arylene group substituted by a substituent selected from the group a cyano group, a carboxyl group, an aminocarbonyl group, a carbamoyl group, an aranyl group, a hydroxyl group, an aryloxycarbonyl group, a methoxycarbonyl group, an ethoxycarbonyl group, a butoxycarbonyl group and an amino group, wherein the substituents together may form a saturated 5-members or 6-membered ring, and R.sup.1 and R.sup.3, and R.sup.2 and R.sup.4 may combine together to form a saturated or unsaturated ring structure.
An electroluminescence device comprising a light emitting material placed between a pair of electrodes wherein the light emitting material comprises a compound represented by the formula:
- ##STR70## wherein R.sup.1 and R.sup.2 are each an alkyl group, a cyclohexyl group;
- an alkoxy group;
- a cyano group;
- an unsubstituted aryl group;
- an aryl group substituted with at least one substituent (a) selected from the group consisting of an alkyl group, an alkoxy group, an acyl group, an acyloxy group, an acyl amino group, an aralkyl group, an aryloxy group, a cyano group, a carboxyl group, a vinyl group, a styryl group, an aminocarbonyl group, an aryloxycarbonyl group, a hydroxyl group, an alkoxycarbonyl group, a halogen group and an amino group, wherein the substituents together may form a 5-membered or 6-members ring;
- R.sup.3 and R.sup.4 are each an unsubstituted heterocyclic group, a heterocyclic group substituted by at least one substituent (a) as defined above, an unsubstituted aryl group or aryl group substituted by at least one substituent (a) as defined above, Ar is an unsubstituted arylene group or an arylene group substituted by a substituent selected from the group consisting of a halogen atom, an alkyl group, an alkoxy group, an acyl group, an acyloxy group, an aralkyl group, an aryloxy group, a cyano group, a carboxyl group, an aminocarbonyl group, a carbamoyl group, an aranyl group, a hydroxyl group, an aryloxycarbonyl group, a methoxycarbonyl group, an ethoxycarbonyl group, a butoxycarbonyl group and an amino group, wherein the substituents together may form a saturated 5-members or 6-membered ring, and R.sup.1 and R.sup.3, and R.sup.2 and R.sup.4 may combine together to form a saturated or unsaturated ring structure.
Dependencies are inferred from the claim text.