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 (20) below.

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: 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: An organic electroluminescence device includes an anode, an emitting layer, and a cathode. The emitting layer contains a first compound, a second compound, and a third compound. An ionization potential Ip1 of the first compound and an ionization potential Ip2 of the second compound satisfy the numerical expression. 0?Ip2?Ip1?0.8[eV] The first compound is a delayed fluorescent compound. The second compound is a fluorescent compound. The third compound has an electron mobility of 1×10?8 cm2/(V·s) or more.

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 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 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 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: An organic electroluminescence device includes an anode, an emitting layer, and a cathode. The emitting layer contains a first compound, a second compound, and a third compound. An ionization potential Ip1 of the first compound and an ionization potential Ip2 of the second compound satisfy a relationship represented by a numerical expression (Numerical Expression 1) below. The first compound is a delayed fluorescent compound. The second compound is a fluorescent compound. The third compound has an electron mobility of 1×10?8 cm2/(V·s) or more. 0?Ip2?Ip1?0.

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: A compound is represented by a formula (20) 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: An organic electroluminescence device includes an anode, an emitting layer, and a cathode. The emitting layer contains a first compound, a second compound, and a third compound, the first compound being a fluorescent compound, the second compound being a delayed fluorescent compound, the third compound being a compound represented by a formula (3). A singlet energy S1(M1) of the first compound, a singlet energy S1(M2) of the second compound, and a singlet energy S1(M3) of the third compound satisfy a relationship of a Numerical Formula 1. In the formula (3), X1 to X14 each independently represent a nitrogen atom or CR80. XA is NR95, a sulfur atom or an oxygen atom.

Abstract: An organic electroluminescence device includes an anode, an emitting layer and a cathode. The emitting layer includes a first compound and a second compound. The first compound is a delayed fluorescent compound. The second compound is a fluorescent compound. A solution of the second compound in toluene has an emission peak wavelength in a range from 430 nm to 480 nm. A molar absorbance coefficient of the second compound at an absorption peak closest to a long-wavelength side is in a range from 29,000 L/(mol·cm) to 1,000,000 L/(mol·cm). The second compound has a Stokes shift in a range from 1 nm to 20 nm.

Abstract: A detection device includes a plurality of pyroelectric elements and a detection circuit. The pyroelectric elements includes a first pyroelectric element through an n-th pyroelectric element serially provided between a detection node and a first power supply node with n being an integer equal to or greater than 2. Each of the first pyroelectric element through the n-th pyroelectric element has a direction of polarization that is set to the same direction. The detection circuit is connected to the detection node.

Abstract: An electro-optical device is provided that includes a plurality of unit circuits and a scanning line drive circuit. Each of the plurality of unit circuits includes a light emitting element, a drive transistor, a light emitting control transistor, and a switching element. Each of the plurality of scanning lines includes a light emitting control line. The scanning line drive circuit includes a first light emitting control line drive circuit connected to one end of the light emitting control line; and a second light emitting control line drive circuit connected to the other end of the light emitting control line. The first and second light emitting control line drive circuits supply the light emitting control signal to the light emitting control line from both ends thereof at a predetermined timing.

Abstract: A detection device includes a plurality of pyroelectric elements, detection circuit and a poling circuit. The pyroelectric elements include a first pyroelectric element through an n-th pyroelectric element serially provided between a detection node and a first power supply node with n being an integer equal to or greater than 2. The detection circuit is connected to the detection node. The poling circuit is configured to perform a poling process, in which a direction of polarization of at least one of the first pyroelectric element through the nth pyroelectric element is set independently of a direction of polarization of another one of the first pyroelectric element through the n-th pyroelectric element.