Invention Grant
- Patent Title: Organic electroluminescent element
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Application No.: US16480913Application Date: 2018-03-09
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Publication No.: US11672169B2Publication Date: 2023-06-06
- Inventor: Shunji Mochizuki , Takeshi Yamamoto , Naoaki Kabasawa
- Applicant: HODOGAYA CHEMICAL CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: HODOGAYA CHEMICAL CO., LTD.
- Current Assignee: HODOGAYA CHEMICAL CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP 2017049617 2017.03.15
- International Application: PCT/JP2018/009163 2018.03.09
- International Announcement: WO2018/168674A 2018.09.20
- Date entered country: 2019-07-25
- Main IPC: H01L51/00
- IPC: H01L51/00 ; C09K11/06 ; H01L51/50

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.
Public/Granted literature
- US20210135116A1 ORGANIC ELECTROLUMINESCENT ELEMENT Public/Granted day:2021-05-06
Information query
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