Title:
ORGANIC EL ELEMENT
Document Type and Number:
Japanese Patent JP3142378
Kind Code:
B2
Abstract:
PURPOSE: To obtain the title element having high reliability and high luminous efficiency by incorporating a coumarin derivative having a skeleton of a specified formula in a luminescent layer.
CONSTITUTION: The element has at least one organic compound layer containing a compound having a skeleton of the formula wherein R1 to R3 are each H, CN, COOH, alkyl, aryl, arylcarbonyl, alkylcarbonyl, aryloxy, alkyloxy, alkyloxycarbonyl, aryloxycarbonyl or a heterocyclic residue provided that the groups in the adjoining positions may be combined with each other to form a ring; R4 to R7 are each lower alkyl; X and Y are each O, S or NT wherein T is H, alkyl or aryl (e.g. a compound of the formula wherein R1 is -CO2C2H5; R2 and R3 are each H; R4 to R7 are each CH3; and X and Y are each O). This element has high reliability and high luminous efficiency.
Inventors:
Tetsuji Inoue
Kenji Nakatani
Kenji Nakatani
Application Number:
JP18766592A
Publication Date:
March 07, 2001
Filing Date:
June 22, 1992
Export Citation:
Assignee:
TDK Co., Ltd.
International Classes:
H05B33/12; C09K11/06; H01L51/50; H05B33/14; H05B33/26; (IPC1-7): H05B33/14; C09K11/06
Attorney, Agent or Firm:
Youichi Ishii
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