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. 06, 2023
Filed:
Mar. 09, 2018
Hodogaya Chemical Co., Ltd., Tokyo, JP;
HODOGAYA CHEMICAL CO., LTD., Tokyo, JP;
Abstract
An object of the present invention is to provide an organic EL element that has (1) high light emission efficiency and high power efficiency, (2) a low light-emission start voltage, (3) a low actual driving voltage, and (4) an especially long lifespan. According to the present invention, provided is an organic electroluminescent element, or organic EL element, having at least an anode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light emitting layer, an electron transport layer, and a cathode, in this order, wherein the second hole transport layer contains an arylamine compound represented by the general formula (1) below, and the electron transport layer contains a pyrimidine derivative represented by the general formula (2) below. Note that A in the general formula (2) represents a monovalent group represented by the structural formula (3) below.