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:
Jan. 01, 2019
Filed:
May. 05, 2016
Samsung Display Co., Ltd., Yongin-si, Gyeonggi-do, KR;
Eonseok Oh, Yongin-si, KR;
Sangyeol Kim, Hwaseong-si, KR;
Jungyeon Kim, Suwon-si, KR;
Minkyoung Jo, Seoul, KR;
Bomi Choi, Seoul, KR;
SAMSUNG DISPLAY CO., LTD., Yongin-si, Gyeonggi-do, KR;
Abstract
An organic electroluminescent device includes a first electrode, a hole transport region on the first electrode, an emission layer on the hole transport region, an electron transport region on the emission layer, and a second electrode on the electron transport region. The electron transport region includes a first electron transport layer on the emission layer; and a second electron transport layer on the first electron transport layer. An absolute value of difference between a highest occupied molecular orbital (HOMO) energy level of the emission layer and a HOMO energy level of the first electron transport layer is about 0.3 eV to about 1.5 eV.