Invention Grant
- Patent Title: Organic light emitting element
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Application No.: US16018789Application Date: 2018-06-26
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Publication No.: US11139435B2Publication Date: 2021-10-05
- Inventor: Ryuji Ishii , Hiroki Ohrui , Kei Tagami , Masumi Itabashi
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Venable LLP
- Priority: JP2013-122500 20130611
- Main IPC: H01L51/00
- IPC: H01L51/00 ; H01L51/50 ; C09K11/06 ; C09K11/02 ; G03G15/04 ; G09G3/3208

Abstract:
Provided is an organic light emitting element including: an anode; a cathode; and an organic compound layer formed between the anode and the cathode and including a hole injection layer, a hole transport layer, and an emission layer, in which: the emission layer includes a host and a dopant; the hole transport layer includes a hole transport material having multiple aromatic hydrocarbon skeletons and a single bond for linking the aromatic hydrocarbon skeletons; the hole transport material has a triplet level T1 of 1.8 eV or more; the hole transport material has a hole mobility of 1×10−5 cm2/Vs or more; and the hole transport layer and the emission layer satisfy relationships represented by the following expression (1): |reduction potential of hole transport material|−|reduction potential of host|>0.1 V (1) and the following expression (2): |HOMO level of hole transport material−HOMO level of host|
Public/Granted literature
- US20180301633A1 ORGANIC LIGHT EMITTING ELEMENT Public/Granted day:2018-10-18
Information query
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