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. 04, 2019
Filed:
Dec. 16, 2014
Beijing Visionox Technology Co., Ltd., Beijing, CN;
Tsinghua University, Beijing, CN;
Yong Qiu, Beijing, CN;
Lian Duan, Beijing, CN;
Dongdong Zhang, Beijing, CN;
Guohui Zhang, Beijing, CN;
BEIJING VISIONOX TECHNOLOGY CO., LTD., Beijing, CN;
TSINGHUA UNIVERSITY, Beijing, CN;
Abstract
The present invention discloses an organic electroluminescent device and a manufacturing method thereof. The host material of the light-emitting layer of the organic electroluminescent device is material in which the triplet state energy level of the CT excited state is higher than that of the n-π excited state by 0 to 0.3 eV; or the triplet state of the host material of the light-emitting layer is higher than that of the n-π excited state by more than 1.0 eV; in addition, the difference in energy level between the second triplet state of the n-π state and the first singlet state of the CT excited state is −0.1 to 0.1 eV; and the luminescent dye is a fluorescent dye. With regard to the organic electroluminescent device in the present invention, as new host material in the light-emitting layer is used and the host material has a donor group and an acceptor group, the triplet state in the light-emitting layer may be fully utilized to achieve a 100% light-emitting efficiency in the fluorescent device. Furthermore, no noble metal is required to be used, thus reducing the cost.