Title:
ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE, AND ELECTRONIC EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2022/260118
Kind Code:
A1
Abstract:
Provided is an organic electroluminescent element (1) comprising: an anode (3); a cathode (4); a light-emitting layer (5) included between the anode (3) and the cathode (4); and a first layer (61) included between the anode (3) and the light-emitting layer (5). The light-emitting layer (5) contains a delayed fluorescent compound, and the first layer (61) contains a first compound. The ionization potential Ip (HT1) of the first compound satisfies the following numerical formula (formula 1), and the hole mobility µh (HT1) of the first compound satisfies the following numerical formula (formula 2). Furthermore, the film thickness D1 of the first layer (61) is 15 nm or greater. Formula 1: Ip (HT1) ≥ 5.70 eV
Formula 2: µh (HT1) ≥ 1×10-5 cm2/Vs
Inventors:
JINDE YUKITOSHI (JP)
HIGASHINO YUTA (JP)
MATSUMOTO HISATO (JP)
SHIOMI TAKUSHI (JP)
HIGASHINO YUTA (JP)
MATSUMOTO HISATO (JP)
SHIOMI TAKUSHI (JP)
Application Number:
PCT/JP2022/023246
Publication Date:
December 15, 2022
Filing Date:
June 09, 2022
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
H01L51/50; G09F9/30; H01L27/32; H05B33/12
Domestic Patent References:
| WO2019230708A1 | 2019-12-05 | |||
| WO2008123178A1 | 2008-10-16 | |||
| WO2020162594A1 | 2020-08-13 | |||
| WO2020004235A1 | 2020-01-02 | |||
| WO2019159919A1 | 2019-08-22 |
Foreign References:
| KR20180043726A | 2018-04-30 | |||
| KR20180063707A | 2018-06-12 | |||
| JP2021061305A | 2021-04-15 | |||
| CN110931649A | 2020-03-27 | |||
| JP2021006523A | 2021-01-21 | |||
| JP2017168420A | 2017-09-21 |
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
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