- Patent Title: Material for forming organic light-emitting layer, coating liquid for forming organic light-emitting element, organic light-emitting element and light source device, and method for manufacturing same
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Application No.: US14131852Application Date: 2012-07-11
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Publication No.: US09954193B2Publication Date: 2018-04-24
- Inventor: Sukekazu Aratani , Hirotaka Sakuma , Shingo Ishihara , Naoya Tokoo , Hiroshi Sasaki
- Applicant: Sukekazu Aratani , Hirotaka Sakuma , Shingo Ishihara , Naoya Tokoo , Hiroshi Sasaki
- Applicant Address: JP Tokyo
- Assignee: HITACHI, LTD.
- Current Assignee: HITACHI, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2011-153423 20110712; JP2011-157408 20110719; JP2011-157415 20110719
- International Application: PCT/JP2012/067660 WO 20120711
- International Announcement: WO2013/008835 WO 20130117
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H01L51/00 ; H05B33/10 ; H05B33/14 ; H01L51/56 ; H01L51/52 ; H01L27/32

Abstract:
In an organic light-emitting element including a first electrode, a second electrode, and a light-emitting layer placed between the first electrode and the second electrode, the light-emitting layer includes a host material, a first emitter, and a second emitter, the emission peak wavelength of the first emitter is longer than the emission peak wavelength of the second emitter, and an aromatic heterocyclic ligand or an auxiliary ligand of the first emitter include an electron withdrawing group. Accordingly, an organic light-emitting element can be provided in which the HOMO value of a specific luminescent dopant is closer to the HOMO value of another luminescent dopant.
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