Title:
ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC EL DISPLAY DEVICE, ORGANIC EL LIGHTING, AND METHOD FOR MANUFACTURING ORGANIC ELECTROLUMINESCENT ELEMENT
Document Type and Number:
WIPO Patent Application WO/2024/004964
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an organic electroluminescent element having low driving voltage, high luminous efficiency, and a long driving lifetime. The present invention pertains to an organic electroluminescent element comprising a positive electrode, a negative electrode, a light-emitting layer, and a hole injection layer, wherein: the light-emitting layer is provided between the positive electrode and the negative electrode; the hole injection layer is provided between the positive electrode and the light-emitting layer; the light-emitting layer contains a specific polycyclic heterocyclic compound and a specific organometallic compound; the polycyclic heterocyclic compound and the organometallic compound satisfy relational expression (E-1); and the hole injection layer contains tetraarylborate ions. T1A≥T1B Expression (E-1) (In expression (E-1), T1A is the triplet energy level (eV) of the organometallic compound and T1B is the triplet energy level (eV) of the polycyclic heterocyclic compound.)
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Inventors:
IIDA KOICHIRO (JP)
OKABE KAZUKI (JP)
UEDA NARA MAYUKO (JP)
OKABE KAZUKI (JP)
UEDA NARA MAYUKO (JP)
Application Number:
PCT/JP2023/023676
Publication Date:
January 04, 2024
Filing Date:
June 26, 2023
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
H10K50/12; C09K11/06; G09F9/30; H10K50/15; H10K50/17; H10K59/10; H10K71/10; H10K85/30; H10K85/60; H10K101/20; H10K101/40
Domestic Patent References:
| WO2022092046A1 | 2022-05-05 | |||
| WO2022071542A1 | 2022-04-07 | |||
| WO2017164268A1 | 2017-09-28 |
Foreign References:
| JP2021163964A | 2021-10-11 | |||
| JP2020510302A | 2020-04-02 | |||
| CN113410405A | 2021-09-17 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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