Title:
ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/118867
Kind Code:
A1
Abstract:
Provided is an organic EL element (1) comprising a first light-emitting layer (51) and a second light-emitting layer (52). The first light-emitting layer (51) contains a first host material, and the second light-emitting layer (52) contains a second host material, wherein the first host material and second host material differ from each other. The first light-emitting layer (51) contains at least a first light-emitting compound, which exhibits light emission for which the maximum peak wavelength is not greater than 500 nm, and the second light-emitting layer (52) contains at least a second light-emitting compound, which exhibits light emission for which the maximum peak wavelength is not greater than 500 nm. The total of the film thicknesses of the first light-emitting layer (51) and the second light-emitting layer (52) is not more than 20 nm, and the first light-emitting compound and the second light-emitting compound may be identical to each other or different from each other. The triplet energy T1(H1) of the first host material and the triplet energy T1(H2) of the second host material satisfy the relation in expression (1). Expression (1): T1(H1) > T1(H2)
Inventors:
MASUDA TETSUYA (JP)
KAMBE EMIKO (JP)
NAKAMURA MASATO (JP)
TASAKI SATOMI (JP)
KAMBE EMIKO (JP)
NAKAMURA MASATO (JP)
TASAKI SATOMI (JP)
Application Number:
PCT/JP2021/044016
Publication Date:
June 09, 2022
Filing Date:
December 01, 2021
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
H05B33/12; C09K11/06; H01L51/50
Domestic Patent References:
| WO2020080417A1 | 2020-04-23 | |||
| WO2021049653A1 | 2021-03-18 | |||
| WO2020209307A1 | 2020-10-15 | |||
| WO2018186374A1 | 2018-10-11 | |||
| WO2018186396A1 | 2018-10-11 | |||
| WO2019235475A1 | 2019-12-12 | |||
| WO2010134350A1 | 2010-11-25 | |||
| WO2020080416A1 | 2020-04-23 | |||
| WO2021090932A1 | 2021-05-14 | |||
| WO2021210582A1 | 2021-10-21 |
Foreign References:
| JP2013067586A | 2013-04-18 | |||
| JP2020520106A | 2020-07-02 |
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
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