Title:
COMPOSITION FOR LIGHT-EMITTING ELEMENT, AND LIGHT-EMITTING ELEMENT CONTAINING THE SAME
Document Type and Number:
Japanese Patent JP2019204946
Kind Code:
A
Abstract:
To provide a composition useful for manufacturing a light-emitting element excellent in the luminance life.SOLUTION: Provided is a composition for a light-emitting element containing a host material and a guest material. The host material is a compound that contains at least one selected from the group consisting of aromatic hydrocarbon groups and heterocyclic groups. The guest material is a compound that has a condensed heterocyclic group containing in the ring a boron atom and at least one selected from the group consisting of an oxygen atom, a sulfur atom, a selenium atom, an spcarbon atom and a nitrogen atom. The difference ΔE between the energy value of the maximum peak in the emission spectrum of the host material at 25°C and the energy value of the peak on the lowest energy side in the absorption spectrum of the guest material at 25°C is 0.50 eV or less. The difference ΔS between the energy value of the maximum peak in the emission spectrum of the guest material at 25°C and the energy value of the maximum peak in the emission spectrum of the guest material at 77 K is 0.10 eV or less.SELECTED DRAWING: None
Inventors:
SASADA TOSHIAKI
MATSUMOTO RYUJI
MATSUMOTO RYUJI
Application Number:
JP2019063784A
Publication Date:
November 28, 2019
Filing Date:
March 28, 2019
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
H01L51/50
Domestic Patent References:
| JP2019204947A | 2019-11-28 | |||
| JP2007015933A | 2007-01-25 | |||
| JP2018061030A | 2018-04-12 |
Foreign References:
| WO2016152544A1 | 2016-09-29 | |||
| US20140346406A1 | 2014-11-27 | |||
| WO2018062278A1 | 2018-04-05 |
Other References:
HATAKEYAMA TAKUJI, ET AL.: "Ultrapure Blue Thermally Activated Delayed Fluorescence Molecules: Efficient HOMO-LUMO Separation by", ADVANCED MATERIALS, vol. Vol. 28, Issue 14, JPN6021030285, 11 February 2016 (2016-02-11), DE, pages 2777 - 2781, ISSN: 0004760053
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshinori Shimizu
Takashi Mikami
Yoshinori Shimizu
Takashi Mikami