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Organic light emitting device containing a hole injection enhancement layer

  • US 5,998,803 A
  • Filed: 05/29/1997
  • Issued: 12/07/1999
  • Est. Priority Date: 05/29/1997
  • Status: Expired due to Term
First Claim
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1. An organic light emitting device comprising:

  • a heterostructure for producing electroluminescence comprised of a hole injection enhancement layer between a hole transporting layer and an anode layer, wherein the hole injection enhancement layer is formed of a compound selected from a group consisting of 3,4,9,10-perylenetetracarboxylic dianhydride;

    3,4,7,8-naphthalenetetracarboxylic dianhydride;

    3,4,9,10-perylenetetracarboxylic dianhydride;

    bis(1,2,5-thiadiazolo)-p-quinobis(1,3-dithiole);

    1,4,5,8-naphthalenetetracarboxylic dianhydride;

    ##STR13## where R=H, alkyl or aryl;

    ##STR14## where R=H, alkyl or aryl;

    a compound having the CA index name, bisbenzimidazo[2,1-a;

    1'"'"',2'"'"'-b'"'"']anthra[2,1,9-def;

    6,5,10-d'"'"'e'"'"'f'"'"']diisoquinoline-10,21-dione;

    a compound having the CA index name, bisnaphth[2'"'"',3'"'"';

    4,5]imidazo[2,1-a;

    2'"'"',1'"'"'-a'"'"']anthra[2,1,9-def;

    6,5,10-d'"'"'e'"'"'f'"'"']diisoquinoline-10,21-dione;

    a compound having the CA index name, bisbenzimidazo[2,1-b;

    2'"'"',1'"'"'-i]benzo[lmn][3,8]phenanthroline-8,1-dione;

    a compound having the CA index name, benzo[lmn]bisnaphth[2'"'"',3'"'"';

    4,5]imidazo[2,1-b;

    2'"'"',1'"'"'-I][3,8]phenanthroline-9,20-dione;

    or a substituted derivative of one of said compounds.

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