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Electroluminescent element
| Details |
Inventors: Nakada, Hitoshi; Wakimoto, Takeo; Shinkai, Masanao; Matsunaga, Daisaku;
Assignee: Pioneer Electronic Corporation (Tokyo, JP); Nippon Kayaku Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Seidleck; James
Assistant Examiner:
Attorney, Agent or Firm: Fleit, Jacobson, Cohn, Price, Holman & Stern
Disclosed herein is an electroluminescent element which is constructed such that a fluorescent substance layer and a hole transport layer, both made of organic compounds and laminated on top of the other, are interposed between a cathode and an anode. The fluorescent substance layer is a thin film containing a bisstyryl derivative. It emits blue light efficiently at a high luminance upon application of a low voltage. |
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DETAILED DESCRIPTION The present invention was designed to eliminate the above-mentioned disadvantages found in the conventional electroluminescent element.
Accordingly, it is an object of the present invention to provide an electroluminescent element which permits the fluorescent substance to efficiently emit light at a high luminance.
The gist of the present invention resides in an electroluminescent element having interposed beneath a cathode and above an anode a fluorescent substance layer of organic compound atop a hole transport layer of organic compound wherein the fluorescent substance layer comprises a fluorescent substance thin film containing a bisstyryl derivative capable of efficiently emitting light at a high luminance upon application of a low voltage and represented by the structural formula (XIII) below.
##STR1## where A denotes ##STR2## m denotes a numeral of 1, 2, 3, or 4; n denotes a numeral of 1 or 2; and R.
sub.
1, R.
sub.
2, R.
sub.
3, and R.
sub.
4 independently denote a functional group selected from the group consisting of --H (hydrogen atom), C.
sub.
2 H.
sub.
2Z+1 (alkyl group, with Z being an integer), OC.
sub.
Y H.
sub.
2Y+1 (alkoxy group, with Y being an integer), --X (halogen group), --NH.
sub.
2 (amino group), and NRR' (dialkylamino group, with R and R' being alkyl groups).
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Manufacturing Materials 
