Title:
ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC ELECTROLUMINESCENT DISPLAY APPARATUS, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/230843
Kind Code:
A1
Abstract:
An organic EL element (1) comprises an anode (3), a cathode (4), a light emitting region (5), and a hole transport zone (6). The light emitting region (5) includes a first light emitting layer (51) including a first host material and a first luminescent compound, and a second light emitting layer (52) including a second host material and a second luminescent compound. The hole transport zone (6) includes one or a plurality of organic layers. At least one organic layer in the hole transport zone (6) is a first organic layer in direct contact with the first light emitting layer (51), and the first organic layer includes a hole transport zone material. The first light emitting layer (51) is disposed on the anode (3) side. The hole transport zone (6) is in direct contact with the anode (3) and the light emitting region (5). A triplet energy T1 (H1) of the first host material and a triplet energy T1 (H2) of the second host material satisfy a mathematical expression (1). The dipole of the first host material is more than or equal to 0.4D. (Expression 1): T1 (H1) > T1 (H2)
Inventors:
MASUDA TETSUYA (JP)
TASAKI SATOMI (JP)
TOYOSHIMA HIROAKI (JP)
NAKAMURA MASATO (JP)
NISHIMURA KAZUKI (JP)
ITOI HIROAKI (JP)
KAMBE EMIKO (JP)
TASAKI SATOMI (JP)
TOYOSHIMA HIROAKI (JP)
NAKAMURA MASATO (JP)
NISHIMURA KAZUKI (JP)
ITOI HIROAKI (JP)
KAMBE EMIKO (JP)
Application Number:
PCT/JP2022/018803
Publication Date:
November 03, 2022
Filing Date:
April 26, 2022
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
G09F9/30; H01L51/50; H05B33/12
Domestic Patent References:
| WO2021049653A1 | 2021-03-18 | |||
| WO2016129536A1 | 2016-08-18 | |||
| WO2018101491A2 | 2018-06-07 | |||
| WO2020080417A1 | 2020-04-23 | |||
| WO2021210305A1 | 2021-10-21 | |||
| WO2021090933A1 | 2021-05-14 | |||
| WO2021090934A1 | 2021-05-14 |
Foreign References:
| JP2007294261A | 2007-11-08 |
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
Download PDF: