Title:
ORGANIC ELECTROLUMINESCENT ELEMENT, LIGHT EMITTING DEVICE, ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/138948
Kind Code:
A1
Abstract:
Provided is an organic electroluminescent element (1) comprising a light emission region (5) disposed between a cathode (4) and an anode (3), and a hole transport band disposed between the anode (3) and the light emission region (5), wherein: the hole transport band includes at least a first anode-side organic layer (61) and a second anode-side organic layer (62); the first anode-side organic layer (61) is directly in contact with the second anode-side organic layer (62); the total film thickness of the hole transport band is 20 nm or more and 80 nm or less; the first anode-side organic layer (61) does not contain a compound which is contained in the second anode-side organic layer (62); the first anode-side organic layer (61) contains a first organic material and a second organic material; the first organic material and the second organic material differ from each other; and the content of the first organic material in the first anode-side organic layer (61) is less than 50 mass%.
Inventors:
TOYOSHIMA HIROAKI (JP)
NISHIMURA KAZUKI (JP)
KAMBE EMIKO (JP)
NAKAMURA MASATO (JP)
MASUDA TETSUYA (JP)
TAKAHASHI YUSUKE (JP)
NISHIMURA KAZUKI (JP)
KAMBE EMIKO (JP)
NAKAMURA MASATO (JP)
MASUDA TETSUYA (JP)
TAKAHASHI YUSUKE (JP)
Application Number:
PCT/JP2021/048348
Publication Date:
June 30, 2022
Filing Date:
December 24, 2021
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C09K11/06; C07D209/86; C07D307/91; G09F9/30; H01L27/32; H01L51/50; H05B33/12
Domestic Patent References:
| WO2018043435A1 | 2018-03-08 | |||
| WO2020171221A1 | 2020-08-27 | |||
| WO2018174293A1 | 2018-09-27 |
Foreign References:
| JP2008509565A | 2008-03-27 | |||
| CN102931357A | 2013-02-13 | |||
| JP2011100943A | 2011-05-19 |
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
Download PDF: