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Title:
DELAYED FLUORESCENCE LIGHT EMITTING SUBSTANCE, AND ORGANIC EL ELEMENT
Document Type and Number:
Japanese Patent JP2015120779
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fluorescence light emitting substance and a thermally activated delayed fluorescence light emitting substance exhibiting a high internal quantum yield, and to provide an organic EL element exhibiting a high external light emitting efficiency obtained by using the fluorescence light emitting substance and the thermally activated delayed fluorescence light emitting substance for a light emitting layer of the organic EL element.SOLUTION: A delayed fluorescence light emitting substance is aromatic hydrocarbon having a substituent Xn in either one of aromatic ring among a benzene ring, a naphthalene ring, a biphenyl ring and a fluorene ring, and the substituent Xn is selected from either one of residues of benzothiazole, coumarin, fluorenone, acridone, quinacridone, acridine, anthraquinone, thioxanthone, phthalimide, naphthyl dicarboimide and pyrene, or a residue of a derivative of the either one, and the number of the substituent is 1 or more. There is also provided an organic EL element containing the delayed fluorescence light emitting substance in a light emitting layer.

Inventors:
UEDA MASAHIRO
KAWASAKI TAKAYOSHI
Application Number:
JP2013263920A
Publication Date:
July 02, 2015
Filing Date:
December 20, 2013
Export Citation:
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Assignee:
KRI INC
International Classes:
C09K11/06; C07C43/20; C07C49/755; C07D209/48; C07D209/66; C07D219/02; C07D335/16; H01L51/50