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Organic electroluminescence device

  • US 5,366,811 A
  • Filed: 05/04/1992
  • Issued: 11/22/1994
  • Est. Priority Date: 09/20/1990
  • Status: Expired due to Term
First Claim
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1. In an organic electroluminescence device, which comprises a light emitting layer, the improvement comprising said light emitting layer comprising a dimerized styryl compound of the formula (a):

  • ##STR85## wherein D and D'"'"' are the same or different from each other and are each an arylene group having 6 to 20 carbon atoms or a divalent aromatic heterocyclic group having 3 to 20 carbon atoms, which are unsubstituted or are mono-substituted or poly-substituted with substituents (a'"'"'),E, E'"'"', F, F'"'"', G and G'"'"' are the same or different from each other and are each a hydrogen atom, or an aryl group having 6 to 20 carbon atoms, a cyclohexyl group, an alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, which are unsubstituted or are mono-substituted or poly-substituted with substituents (a'"'"'), or a monovalent aromatic heterocyclic group having 3 to 20 carbon atoms which is unsubstituted or mono-substituted or poly-substituted with substituents (a'"'"'), with the proviso that F and G are not both hydrogen atoms, and F'"'"' and G'"'"' are not both hydrogen atoms;

    the substituents (a'"'"') are an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an acyl group having 1 to 6 carbon atoms, an aralkyl group having 7 to 8 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, an alkoxy-carbonyl group having 2 to 7 carbon atoms, an aryloxy-carbonyl group having 7 to 21 carbon atoms, an acyloxy group having 1 to 6 carbon atoms, an acylamino group having 1 to 6 carbon atoms, halogen atoms, a carboxyl group, an amino-carbonyl group, a hydroxyl group, a cyano group, a nitro group, or an amino group;

    E and D, or E'"'"'and D'"'"' may combine with each other to form a saturated or unsaturated five-membered or six-membered ring, F and G, or F'"'"' and G'"'"' may combine with each other to form a saturated or unsaturated five-membered or six-membered ring; and

    Q is a divalent group to break the conjunction.

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