Abstract: A compound is represented by a formula (2) below.

Abstract: An organic electroluminescence device includes an anode, a second organic layer, a first organic layer, and a cathode in this order. The first organic layer contains a first compound and a second compound. The second organic layer contains a third compound. The first compound is a compound represented by a formula (1). The second compound is a delayed fluorescent compound. The third compound is a compound represented by a formula (3). In the formula (1), X is a nitrogen atom or a carbon atom bonded to Y, Y being a hydrogen atom or a substituent. In the formula (3), n is an integer ranging from 1 to 4, XB is a group represented by a formula (3A). In the formula (3A), Ar1 and Ar2 are each independently a monovalent or polyvalent aromatic hydrocarbon group, and Cz is a group represented by a formula (3B-1) or the like.

Abstract: A control valve assembly includes a housing accommodating an electromagnetic coil unit which is disposed in an in-housing passage and drives a valve element to open and close the in-housing passage. An inflow-outflow member is coupled to the housing, and includes an inflow portion having an inflow passage through which evaporative fuel flows toward the in-housing passage, and an outflow portion having an outflow passage through which the evaporative fuel from the in-housing passage flows. The outflow passage in the outflow portion and the inflow passage in the inflow portion communicate with each other through the in-housing passage.

Abstract: An organic electroluminescence device includes an anode, an emitting layer and a cathode, in which the emitting layer includes a first compound and a second compound. The first compound is a delayed-fluorescent compound. The second compound is represented by a formula (2) below, in which X is a nitrogen atom or a carbon atom bonded to Y; R21 to R26 are each independently a hydrogen atom or a substituent; Z21 and Z22 are each independently selected from the group consisting of a halogen atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, and a substituted or unsubstituted aryloxy group.

Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode, in which the emitting layer contains a first compound represented by a formula (1) and a fluorescent second compound. A singlet energy S1(M1) of the first compound is larger than a singlet energy S1(FL) of the fluorescent second compound. A is a group represented by a formula (1b).

Abstract: An organic light-emitting medium including a pyrene derivative represented by the following formula (1) and a phenyl-substituted anthracene derivative represented by the following formula (2): wherein Ar1 to Ar4 are independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 20 ring atoms.

Abstract: An organic electroluminescence device includes an anode, a first organic layer, a second organic layer, and a cathode in this order. The first organic layer contains a first compound and a second compound. The second organic layer contains a third compound. The first compound is a compound represented by a formula (1). The second compound is a delayed fluorescent compound. The third compound is a compound represented by a formula (3). In the formula (1), X is a nitrogen atom or a carbon atom bonded with Y, Y is a hydrogen atom or a substituent. In the formula (3), X1 to X3 are each independently a nitrogen atom or CR1, Ar1 and Ar2 are each independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and the like, and A is represented by a formula (3A), HAr in the formula (3A) being represented by a formula (3B).

Abstract: An organic EL apparatus (1) includes a plurality of pixels including a first pixel (10) and a second pixel (20), in which the first pixel (10) has a first emitting layer (15) containing a fluorescent first compound, the second pixel (20) has a second emitting layer (25) containing a delayed fluorescent second compound, and the first pixel (10) and the second pixel (20) share a common layer (50) extending across the first pixel (10) and the second pixel (20).

Abstract: An organic electroluminescence device comprising: a cathode; an anode; and an organic layer between the cathode and the anode, wherein the organic layer comprises a compound represented by the following formula (1) and a compound represented by the following formula (11).

Abstract: An organic electroluminescence device includes an anode, a first organic layer, and a cathode in this order. The first organic layer contains a first compound, a second compound, and a third compound. The first compound is a compound represented by a formula (1). The second compound is a delayed fluorescent compound. The third compound is a compound represented by a formula (3). In the formula (1), X is a nitrogen atom or a carbon atom bonded to Y, Y being a hydrogen atom or a substituent. In the formula (3), n is 1 to 4, XB is a group represented by a formula (3A). In the formula (3A), Ar1 and Ar2 are each independently a monovalent or polyvalent aromatic hydrocarbon group, and Cz is a group represented by a formula (3B-1) and the like.

Abstract: An organic electroluminescence device comprising a cathode, an anode and an organic layer disposed between the cathode and the anode, wherein the organic layer comprises a fluorescent emitting layer and the fluorescent emitting layer comprises at least one first compound selected from the compounds represented by formulae (19), (21), (22), and (23), a second compound selected from the compounds represented by formula (3a), and a dopant material selected from the compounds represented by formulae (D1) and (D2) is excellent in its performance.

Abstract: A compound represented by the following formula (1):

Abstract: An organic EL apparatus includes a plurality of pixels including a first pixel and a second pixel, in which the first pixel has a first emitting layer containing a fluorescent first compound, the second pixel has a second emitting layer containing a delayed fluorescent second compound, and the first pixel and the second pixel share a common layer extending across the first pixel and the second pixel.

Abstract: An organic electroluminescence device includes: an anode; an emitting layer; and a cathode. The emitting layer contains a first compound and a second compound, the first compound being a delayed fluorescent compound, the second compound being a compound represented by a formula (2).

Abstract: A compound is represented by a formula (2) below.

Abstract: Organic EL devices having excellent performance and electronic devices comprising the organic EL devices are provided. The organic EL device comprises a cathode, an anode, and an organic layer disposed between the cathode and the anode, wherein the organic layer comprises one or more layers that comprise a fluorescent emitting layer and the fluorescent emitting layer comprises a first compound represented by formula (P) and a second compound that is not the same as the first compound. The electronic device comprises the organic EL device. wherein, ?1, ?2, Z, RB, RC, m, and n are as defined in the description.

Abstract: An organic electroluminescence device having a further improved lifetime, which comprising a cathode, an anode and an organic layer disposed between the cathode and the anode, wherein the organic layer comprises a fluorescent emitting layer and the fluorescent emitting layer comprises at least one dopant material selected from the compounds represented by formulae (D1) and (D2), at least one first compound selected from the compounds represented by formulae (19), (21), (22), and (23), and at least one second compound selected from the compounds represented by formulae (2a), (2b), and (2c) and an electronic device comprising the organic electroluminescence device are described.

Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode. The emitting layer contains a first compound and a second compound, the first compound being a thermally activated delayed fluorescent compound and represented by a formula (1) below, the second compound being a compound represented by a formula (2) below, a singlet energy S1(M1) of the first compound and a singlet energy S1(M2) of the second compound satisfying a relationship of a Numerical Formula 1 below.

Abstract: An organic electroluminescence device includes an anode, an emitting layer, and a cathode, the emitting layer including a delayed-fluorescent first compound represented by a formula (1), and a fluorescent second compound. In the formula (1), Ar1 is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms and the like, and ArEWG is a substituted or unsubstituted heteroaryl group having 5 to 30 ring atoms and including one or more nitrogen atom in the ring, or an aryl group having 6 to 30 ring carbon atoms and substituted by one or more cyano group, at least one of Ar1 and ArX being at least one group selected from the group consisting of groups represented by a formula (1a) and the like.

Abstract: A compound is represented by a formula (20) below.