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:
Sep. 27, 2022
Filed:
Nov. 01, 2018
Idemitsu Kosan Co.,ltd., Tokyo, JP;
Takayasu Sado, Sodegaura, JP;
Tetsuya Masuda, Sodegaura, JP;
Yoshiaki Takahashi, Sodegaura, JP;
Emiko Kambe, Sodegaura, JP;
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Abstract
A top emission organic EL device includes an anode, hole transporting zone, emitting layer, electron transporting zone, and cathode in this order. The hole transporting zone includes: a first layer interposed between the anode and the emitting layer; and a second layer interposed between the first layer and the emitting layer. The first layer contains a first compound and the second layer contains a second compound. A film thickness of the first layer and the second layer satisfies a formula (1) and (2), respectively. A hole mobility μof the first compound satisfies a formula (3) and a hole mobility μof the second compound satisfies a formula (4),100 nm≤1≤300 nm  (1)1 nm≤2≤20 nm  (2)1.0×10[cm]≤μ≤1.0×10[cm]  (3)1.0×10[cm]≤μ≤1.0×10[cm]  (4).