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:
Jun. 02, 2026
Filed:
Oct. 20, 2020
Hodogaya Chemical Co., Ltd., Tokyo, JP;
Sfc Co., Ltd., Cheongju-si, KR;
Kazuyuki Suruga, Tokyo, JP;
Kouki Kase, Tokyo, JP;
Takeshi Yamamoto, Tokyo, JP;
Shuichi Hayashi, Tokyo, JP;
Soon-Wook Cha, Cheongju-si, KR;
Sung-Hoon Joo, Cheongju-si, KR;
Byung-Sun Yang, Cheongju-si, KR;
Ji-Hwan Kim, Cheongju-si, KR;
Hodogaya Chemical Co., Ltd., Tokyo, JP;
SFC Co., Ltd., Cheongju-si, KR;
Abstract
The present inventors have focused the fact that an arylamine material having a specific structure is excellent in hole injection/transport ability, thin film stability and durability. The arylamine compound of the above can be selected as a material for the hole transport layer, holes injected from the anode side can be efficiently transported. Furthermore, various organic EL devices combining electron transport materials having a specific structure and the like were manufactured, and the characteristics of the devices were evaluated diligently.