Invention Application
- Patent Title: ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
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Application No.: US17642220Application Date: 2020-09-11
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Publication No.: US20220348522A1Publication Date: 2022-11-03
- Inventor: Satomi TASAKI , Kazuki NISHIMURA , Ryoji MAEDA , Yuichiro KAWAMURA , Yuki NAKANO
- Applicant: IDEMITSU KOSAN CO.,LTD.
- Applicant Address: JP Tokyo
- Assignee: IDEMITSU KOSAN CO.,LTD.
- Current Assignee: IDEMITSU KOSAN CO.,LTD.
- Current Assignee Address: JP Tokyo
- Priority: JP2019-167582 20190913,JP2019-213461 20191126,JP2019-239933 20191227,JP2020-066268 20200401,JP2020-073061 20200415
- International Application: PCT/JP2020/034593 WO 20200911
- Main IPC: C07C15/38
- IPC: C07C15/38 ; C07D307/91 ; C07D333/76 ; C07C13/62 ; C07D211/54 ; C07D311/82 ; C07C15/30 ; C07C15/28 ; C07D471/06 ; C07F7/08 ; C07D487/06 ; C07D491/16 ; C07D491/22 ; C07D495/22 ; C07F5/02 ; C07D493/04 ; C07D495/04 ; C07D519/00 ; C07D405/10 ; C07C255/34 ; C07D403/14 ; C07D231/56 ; C07D405/12 ; C07C255/51 ; C07D241/38 ; C07D491/04 ; C07D251/24 ; C07F1/02 ; C07D403/10 ; H01L51/00 ; H01L51/50

Abstract:
An organic EL device includes a first emitting layer and a second emitting layer, in which the first emitting layer contains a first host material, the second emitting layer contains a second host material, the first and the second host material are mutually different, the first emitting layer and the second emitting layer at least contains a compound that emits fluorescence having a main peak wavelength of 500 nm or less, respectively, the compound contained in the first emitting layer and that emits fluorescence having a main peak wavelength of 500 nm or less is the same as or different from the compound contained in the second emitting layer, and a triplet energy T1(H1) of the first host material and a triplet energy T1(H2) of the second host material satisfy a numerical formula (Numerical Formula 1), T1(H1)>T1(H2) (Numerical Formula 1).
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