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Title:
ORGANIC ELECTROLUMINESCENT ELEMENT, DISPLAY DEVICE AND LIGHTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/207776
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an organic EL element which has an emission peak in the near infrared region and which exhibits high luminous efficiency. This organic EL element has: an anode; a cathode; and at least one organic layer, including a light-emitting layer, disposed between the anode and cathode. The light-emitting layer contains a first organic compound, a second organic compound, and a third organic compound that satisfy formula (i) and formula (ii). Formula (i): ES1(A) > ES1(B) > ES1(C). Formula (ii): ET1(A) > ET1(B). The second organic compound is a delayed luminous material for which ΔEST is 0.3 eV or less, and the third organic compound is a luminous material which is represented by formula (1) and for which the maximum emission wavelength in a fluorescence spectrum falls within the range 700-1000 nm.

Inventors:
SUGAWARA, Ryutaro
SUZUKI, Takatugu
ADACHI, Chihaya
Application Number:
JP2018/017782
Publication Date:
November 15, 2018
Filing Date:
May 08, 2018
Export Citation:
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Assignee:
KONICA MINOLTA, INC. (2-7-2, Marunouchi Chiyoda-k, Tokyo 15, 〒1007015, JP)
KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (6-10-1, Hakozaki Higashi-ku, Fukuoka-sh, Fukuoka 81, 〒8128581, JP)
International Classes:
H01L51/50; G09F9/30; H01L27/32
Domestic Patent References:
WO2017043175A12017-03-16
WO2018008721A12018-01-11
Foreign References:
JP2014510804A2014-05-01
CN104830320A2015-08-12
JP2018092993A2018-06-14
JP2018093175A2018-06-14
Attorney, Agent or Firm:
WASHIDA, Kimihito (8th Floor, Shinjuku First West Bldg. 1-23-7, Nishi-Shinjuku, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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