Abstract: A light-emitting element having a long lifetime is provided. A light-emitting element exhibiting high emission efficiency in a high luminance region is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains a first organic compound, a second organic compound, and a phosphorescent compound. The first organic compound is represented by a general formula (GO). The molecular weight of the first organic compound is greater than or equal to 500 and less than or equal to 2000. The second organic compound is a compound having an electron-transport property. In the general formula (GO), Ar1 and Ar2 each independently represent a fluorenyl group, a spirofluorenyl group, or a biphenyl group, and Ar3 represents a substituent including a carbazole skeleton.

Abstract: A novel organic compound is provided. Alternatively, an organic compound that exhibits light emission with favorable chromaticity is provided. Alternatively, an organic compound that exhibits blue light emission with favorable chromaticity is provided. Alternatively, an organic compound with favorable emission efficiency is provided. Alternatively, an organic compound having a high carrier-transport property is provided. Alternatively, an organic compound with favorable reliability is provided. An organic compound including at least one amino group in which any one of a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted carbazolyl group is boneded to any one of a substituted or unsubstituted naphthobisbenzofuran skeleton, a substituted or unsubstituted naphthobisbenzothiophene skeleton, and a substituted or unsubstituted naphthobenzofuranobenzothiophene skeleton is provided.

Abstract: A novel organic compound is provided. An organic compound that emits light with high chromaticity is provided. An organic compound that emits blue light with high chromaticity is provided. An organic compound with high emission efficiency is provided. An organic compound having an excellent hole-transport property is provided. An organic compound having high reliability is provided. An organic compound that has a naphtho[2,3-b;7,6-b?]bisbenzofuran skeleton or a naphtho[2,3-b;7,6-b?]bisbenzothiophene skeleton and has a molecular weight of less than or equal to 5000 is provided. The present inventors have found that the organic compound is a significantly effective skeleton as a luminophor of a light-emitting element. The organic compound has high emission efficiency and exhibits favorable blue light emission; thus, a light-emitting element using the organic compound can be a blue light-emitting element with high emission efficiency.

Abstract: A novel organic compound with favorable thermophysical properties is provided. An organic compound represented by General Formula (G1) is provided. At least one of X1 to X5 is a secondary or tertiary alkyl group having 3 to 6 carbon atoms in which a carbon atom bonded to a phenyl group branches. Each of R1 to R7 is independently any of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, and an unsubstituted or alkyl-substituted aryl group having 6 to 13 carbon atoms. Ar1 represents a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more aromatic rings, and Ar2 represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Furthermore, n is any of 1 to 3.

Abstract: A novel organic compound represented by General Formula (G1) is provided. In General Formula (G1), X1 and X2 each independently represent a secondary or tertiary alkyl group having 3 to 6 carbon atoms and having a branched carbon atom which is bonded to a phenyl group. In addition, Ar1 represents a substituted or unsubstituted condensed aromatic ring skeleton having 10 to 60 carbon atoms and composed of two or more rings or a substituted or unsubstituted condensed heteroaromatic ring skeleton having 8 to 60 carbon atoms and composed of two or more rings. Furthermore, Ar2 represents a substituted or unsubstituted aryl group having 6 to 25 carbon atoms. Moreover, n represents any of 1 to 3, and in the case where n is 2 or more, two or more groups bonded to Ar1 may be identical or different.

Abstract: A biosensor capable of highly sensitive detection of a recognition target substance while having structural stability is provided at low cost. The biosensor is for capturing and detecting a recognition target substance and includes a linker made of a hydrocarbon compound having two or more particular functional groups, a peptide serving as a molecular recognition substance directly bonded to one particular functional group of the linker, and a support directly bonded to the other particular functional group of the linker. Preferably, the particular functional groups each are a reaction product functional group of an epoxy group and an amino group. The peptide is an artificially synthesized peptide including three or more consecutive amino acid sequences, among amino acid sequences of a natural immunoglobulin, that exist in a part corresponding to a hypervariable area of the natural immunoglobulin.