Organic light-emitting element, display apparatus, photoelectric conversion apparatus, electronic equipment, lighting apparatus, moving body, and exposure light source
A organic light-emitting element including a positive electrode, a light-emitting layer, and a negative electrode in this order, wherein the light-emitting layer contains a dopant material, a host material, and an assist material, the dopant material is a compound represented by the following general formula [1], the host material is a hydrocarbon compound, and the assist material has a lower LUMO level than the host material. In the formula [1], R 1 to R 10 denote a hydrogen atom, an alkyl group, or the like. X denotes O or S. m denotes an integer in the range of 1 to 3, and n denotes an integer in the range of 0 to 2, provided that m+n is 3. The partial structure IrL n is any one of structures represented by the following formulae [2] and [3], wherein R 11 to R 21 denote a hydrogen atom, an alkyl group, or the like.
1 . An organic light-emitting element comprising:
a positive electrode, a light-emitting layer, and a negative electrode in this order,
wherein the light-emitting layer contains a dopant material, a host material, and an assist material,
the dopant material is a compound represented by the following general formula [1],
the host material is an aromatic hydrocarbon compound, and
the assist material has a lower LUMO level than the host material (farther from the vacuum level),
wherein R 1 to R 10 independently denote a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted silyl group, or a cyano group,
X denotes O or S,
m denotes an integer in the range of 1 to 3, and n denotes an integer in the range of 0 to 2, provided that m+n is 3, and
the partial structure IrL n is any one of structures represented by the following general formulae [2] and [3],
wherein R 11 to R 21 independently denote a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted silyl group, or a cyano group, and
wherein the organic light-emitting element emits yellow light.
2 . The organic light-emitting element according to claim 1 , wherein the assist material is a compound partially having any one of the following structures:
wherein X denotes an oxygen atom, a sulfur atom, or a substituted or unsubstituted carbon atom.
3 . The organic light-emitting element according to claim 1 , wherein the host material has at least one of a triphenylene ring, a phenanthrene ring, a chrysene ring, and a fluoranthene ring as a backbone.
4 . The organic light-emitting element according to claim 1 , wherein at least one of R 1 to R 21 denotes an alkyl group having 1 to 4 carbon atoms.
5 . The organic light-emitting element according to claim 1 , wherein the organic light-emitting element emits green light.
6 . The organic light-emitting element according to claim 1 , further comprising another light-emitting layer on the light-emitting layer, wherein the other light-emitting layer emits light of a different emission color from the light-emitting layer.
7 . The organic light-emitting element according to claim 6 , wherein the organic light-emitting element emits white light.
8 . A display apparatus comprising a plurality of pixels, wherein at least one of the plurality of pixels includes the organic light-emitting element according to claim 1 and an active element coupled to the organic light-emitting element.
9 . The display apparatus according to claim 8 , further comprising a color filter.
10 . A photoelectric conversion apparatus comprising:
an optical unit with a plurality of lenses;
an imaging element configured to receive light passing through the optical unit; and
a display unit configured to display an image taken by the imaging element,
wherein the display unit includes the organic light-emitting element according to claim 1 .
11 . Electronic equipment comprising:
a display unit including the organic light-emitting element according to claim 1 ;
a housing in which the display unit is provided; and
a communication unit configured to communicate with an outside provided in the housing.
12 . A lighting apparatus comprising:
a light source including the organic light-emitting element according to claim 1 ; and
a light-diffusing unit or an optical filter that transmits light emitted by the light source.
13 . A moving body comprising:
a lamp including the organic light-emitting element according to claim 1 ; and
a body to which the lamp is provided.
14 . An exposure light source of an electrophotographic image-forming apparatus, comprising the organic light-emitting element according to claim 1 .
15 . An organic light-emitting element comprising:
a positive electrode, a light-emitting layer, and a negative electrode in this order,
wherein the light-emitting layer contains a dopant material, a host material, and an assist material,
the dopant material is a compound represented by the following general formula [1],
the host material is an aromatic hydrocarbon compound, and
the assist material has a lower LUMO level than the host material (farther from the vacuum level),
wherein R 1 to R 7 , R 9 , and R 10 independently denote a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted silyl group, or a cyano group,
R 8 denotes a phenyl group,
X denotes O or S,
m denotes an integer in the range of 1 to 3, and n denotes an integer in the range of 0 to 2, provided that m+n is 3, and
the partial structure IrL n is any one of structures represented by the following general formulae [2] and [3],
wherein R 11 to R 21 independently denote a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted silyl group, or a cyano group.
16 . An organic light-emitting element comprising:
a positive electrode, a light-emitting layer, and a negative electrode in this order,
wherein the light-emitting layer contains a dopant material, a host material, and an assist material,
wherein the dopant material is any one of the following compounds,
the host material is an aromatic hydrocarbon compound, and
the assist material has a lower LUMO level than the host material (farther from the vacuum level),
wherein R 1 to R 10 independently denote a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted silyl group, or a cyano group,
X denotes O or S,
m denotes an integer in the range of 1 to 3, and n denotes an integer in the range of 0 to 2, provided that m+n is 3, and
the partial structure IrL n is any one of structures represented by the following general formulae [2] and [3],
wherein R 11 to R 21 independently denote a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted silyl group, or a cyano group.