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:
Apr. 26, 2022
Filed:
Mar. 15, 2016
Dow Global Technologies Llc, Midland, MI (US);
Rohm and Haas Electronic Materials Korea Ltd., Cheonan-si, KR;
Sang Hee Cho, Hwaseong-si, KR;
Hong Yeop Na, Hwaseong-si, KR;
Zhengming Tang, Shanghai, CN;
Shaoguang Feng, Shanghai, CN;
Doo-Hyeon Moon, Hwaseong-si, KR;
Rohm and Haas Erlectronic Materials Korea Ltd.;
DOW GLOBAL TECHNOLOGIES LLC, Midland, MI (US);
Abstract
The present invention relates to an organic EL device comprising an electron buffer material, and a first electrode, a second electrode opposing the first electrode, a light-emitting layer disposed between the two electrodes, and an electron transport zone and an electron buffer layer disposed between the light-emitting layer and the second electrode. By using an electron buffer material according to the present invention, the organic EL device having low driving voltage, high luminous efficiency, and excellent lifespan can be provided.