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:
Oct. 21, 2019
Filed:
Jan. 04, 2016
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Yuichiro Kawamura, Sodegaura, JP;
Masahiro Kawamura, Sodegaura, JP;
Hitoshi Kuma, Sodegaura, JP;
Hirokatsu Ito, Sodegaura, JP;
IDEMITSU KOASN CO., LTD., Tokyo, JP;
Abstract
An organic electroluminescence device includes an anode, an emitting layer, an electron-transporting region, and a cathode, the anode, the emitting layer, the electron-transporting region, and the cathode being stacked in this order, the emitting layer including a host material, and a dopant material that emits fluorescence having a main peak wavelength of 550 nm or less, the electron-transporting region including a barrier layer that is adjacent to the emitting layer, and the barrier layer including a barrier material that includes an electron-transporting structural part, and a triplet barrier structural part that includes a fused polycyclic aromatic hydrocarbon compound, and satisfies the relationship 'E>E' (where, Eis the triplet energy of the host material, and Eis the triplet energy of the barrier material).