The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2022
Filed:
Jun. 17, 2019
Kwansei Gakuin Educational Foundation, Hyogo, JP;
Jnc Corporation, Tokyo, JP;
Takuji Hatakeyama, Hyogo, JP;
Yukihiro Fujita, Chiba, JP;
KWANSEI GAKUIN EDUCATIONAL FOUNDATION, Hyogo, JP;
SK MATERIALS JNC CO., LTD., Gyeonggi-Do, KR;
Abstract
An organic electroluminescent element includes a light emitting layer containing a polycyclic aromatic compound represented by (1) or its multimer having plural structures represented by (1) and an anthracene-based compound represented by (3). In (1) and (3), rings A to C represent optionally substituted aryl rings or heteroaryl rings, Xand Xrepresent >O, >N—R, >C(—R), >S, or >Se, R in >N—R represents aryl etc., R in >C(—R)represents hydrogen etc., R in >N—R and/or R in >C(—R)may be bonded to ring A, B, and/or C via linking group or single bond, X's and Ar's represent hydrogen or optionally substituted aryls, not all X's and Ar's represent hydrogen simultaneously, and at least one hydrogen in compound represented by (1) or (3) may be substituted by halogen etc. In the light emitting layer, concentration of the polycyclic aromatic compound or its multimer changes from a positive electrode layer to a negative electrode layer.