Abstract: To provide a novel organic compound that is highly convenient, useful, or reliable. General Formula (G2), X represents a sulfur atom or an oxygen atom; R1, R2, R6 to R9, R20 to R26, R30 to R34, R40 to R43, R103 to R105, R135, and R136 each independently represent hydrogen (including deuterium), a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 carbon atoms, a substituted or unsubstituted aryl group having 10 to 30 carbon atoms, a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group; n represents an integer of 1 to 4, when n is 2 or more, two or more R40s may be the same as or different from each other, and the same applies to two or more R41s to R43s.

Abstract: An organic compound represented by General Formula (G1) is provided. Ar1 represents an aryl group having 6 to 30 carbon atoms or a heteroaryl group having 2 to 30 carbon atoms; Ar2 is a group represented by General Formula (G1-1); R1 to R17 each independently represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, and a cycloalkyl group having 3 to 10 carbon atoms; and n represents an integer of 0 to 3.

Abstract: A novel light-receiving device that is highly convenient, useful, or reliable is provided. A light-receiving device including a light-receiving layer (203) between a pair of electrodes (201, 202) is provided. The light-receiving layer 203 includes an active layer. The active layer includes a first organic compound. An SP value of the first organic compound is greater than or equal to 9.0 [(cal/cm3)1/2] and less than or equal to 11.0 [(cal/cm3)1/2]. Alternatively, a light-receiving device including a light-receiving layer (203) between a pair of electrodes (201, 202) is provided. The light-receiving layer (203) includes an active layer. The active layer includes a first organic compound. An absolute value of a difference in an SP value between the first organic compound and an oxygen-containing solvent except for alcohol is less than or equal to 1.0 [(cal/cm3)1/2].

Abstract: An organic compound is represented by General Formula (G1) below. In General Formula (G1), X represents a sulfur atom or an oxygen atom, Ar2 represents a group represented by General Formula (G1-1) below, and Ar1 represents an aryl group having 6 to 30 carbon atoms or a heteroaryl group having 2 to 30 carbon atoms. At least one of R1 to R16 and R21 to R29 represents any of halogen, a nitrile group, an alkenyl group, a vinyl group, an alkynyl group, an ethynyl group, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 10 carbon atoms, an aryl group having 6 to 30 carbon atoms, and a heteroaryl group having 2 to 30 carbon atoms.

Abstract: A highly efficient light-emitting device is provided. The light-emitting device includes a light-emitting layer between a first electrode and a second electrode. The light-emitting layer includes at least a light-emitting substance and a first substance, the half width of an emission spectrum of the light-emitting substance is 0.35 eV or less, the luminescence lifetime of delayed fluorescence caused by photoexcitation of the first substance is shorter at a first temperature than at a second temperature, the first temperature is lower than the second temperature, and the first temperature and the second temperature are each higher than or equal to 10 K and lower than or equal to 300 K.

Abstract: A light-emitting device with favorable carrier balance is provided. The light-emitting device includes a light-emitting layer between a first electrode and a second electrode. The light-emitting layer includes at least a first substance and a light-emitting substance, the first substance includes an organic compound having one or more of a carbazole ring, an aromatic amine skeleton, and a ?-electron deficient heteroaromatic ring, a luminescence lifetime of delayed fluorescence caused by photoexcitation of the light-emitting substance is shorter at a first temperature than at a second temperature, the first temperature is lower than the second temperature, and the first temperature and the second temperature are each higher than or equal to 10 K and lower than or equal to 300 K.

Abstract: A highly heat-resistant organic compound with favorable hole-transport properties is provided. The organic compound is represented by General Formula (G1). In General Formula (G1), X represents a sulfur atom or an oxygen atom, and R21 to R25 and R27 to R30 each independently represent any one of hydrogen, halogen, a nitrile group, an alkenyl group, a vinyl group, an alkynyl group, an ethynyl group, a straight-chain alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkylsilyl group having 3 to 10 carbon atoms, an aryl group having 6 to 30 carbon atoms, and a heteroaryl group having 2 to 30 carbon atoms. Ar1 represents an aryl group having 6 to 30 carbon atoms or a heteroaryl group having 2 to 30 carbon atoms. Ar2 is represented by General Formula (G1-1).

Abstract: A photoelectric conversion device in which an increase in driving voltage is inhibited is provided. The photoelectric conversion device includes a first electrode, a second electrode, and an organic compound layer; the organic compound layer is positioned between the first electrode and the second electrode; the organic compound layer includes a first layer; a structure body including projections is included between the first layer and the second electrode; and the structure body contains a first organic compound.

Abstract: A novel organic compound that is highly convenient, useful, or reliable is provided. An organic compound represented by General Formula (G1) is provided. In General Formula (G1), D1 represents a thiophene-diyl group, a furan-diyl group, a thiophene-containing heteroarylene group, or a furan-containing heteroarylene group; Ar1 and Ar2 each independently represent a heteroarylene group or an arylene group; A1 and A2 each independently represent hydrogen, deuterium, a nitro group, an alkyl group, a halogen, an alkyl halide group, a cyano group, an alkoxy group, a vinyl group, or a formyl group; n1 represents an integer of 1 or more; and m1 and k1 each independently represent an integer of 0 to 3.

Abstract: A vehicle lamp according to an aspect of the present invention includes a light source, a metal light-source stage including a light-source mounting portion, and a lens member that emits light from the light source toward the front of the lamp. The light-source stage includes a support portion for the lens member. The lens member includes a leg projecting toward the light-source stage and having an end that is supported by the support portion. The support portion includes three projections that abut the leg in a state in which the leg is supported by the support portion and position the lens member in a direction of an optical axis. The three projections are positioned relative to one another such that at least a portion of the light source lies in an extension range of a triangle with vertices given by the three projections.

Abstract: A sunlight restricting member is disposed between a light emitting element and a lens. The sunlight restricting member is configured (i) to allow direct light from the light emitting element to be incident on the lens and (ii) to restrict sunlight from reaching, through the lens, at least one of the light emitting element and a light source support member.

Abstract: A vehicle lamp according to an aspect of the present invention includes a light source, a metal light-source stage including a light-source mounting portion, and a lens member that emits light from the light source toward the front of the lamp. The light-source stage includes a support portion for the lens member. The lens member includes a leg projecting toward the light-source stage and having an end that is supported by the support portion. The support portion includes three projections that abut the leg in a state in which the leg is supported by the support portion and position the lens member in a direction of an optical axis. The three projections are positioned relative to one another such that at least a portion of the light source lies in an extension range of a triangle with vertices given by the three projections.

Abstract: A sunlight restricting member is disposed between a light emitting element and a lens. The sunlight restricting member is configured (i) to allow direct light from the light emitting element to be incident on the lens and (ii) to restrict sunlight from reaching, through the lens, at least one of the light emitting element and a light source support member.