Abstract: A compound represented by the general formula (1) is useful as a light-emitting material. In the general formula (1), Ar1 to Ar3 each represent a substituted or unsubstituted aryl group, provided that at least one of Ar1 to Ar3 each represent a carbazolyl group having an N-position substituted with a group containing an electron withdrawing group.

Abstract: A compound that emits fluorescence and delayed fluorescence is provided as a material for an organic electroluminescent device of high efficiency, and an organic photoluminescent device and an organic electroluminescent device of high efficiency and high luminance are provided using this compound. The spiro compound of a general formula (1) having an azafluorene ring structure is used as a constituent material of at least one organic layer in an organic electroluminescent device that includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes.

Abstract: A compound represented by the general formula (1) is useful as a light-emitting material. R1, R3, and R5 each represent a cyano group, or R1, R2, R4, and R5 each represent a cyano group; and the others of R1 to R6 each represent a group represented by any one of the following general formula (4), etc.

Abstract: An organic light-emitting device having a light-emitting layer containing a compound represented by the general formula below has a high light emission efficiency. In the general formula, at least one of R1 to R5 represents a cyano group, at least one of R1 to R5 represents a 9-carbazolyl group, a 1,2,3,4-tetrahydro-9-carbazolyl group, a 1-indolyl group or a diarylamino group, and the balance of R1 to R5 represents a hydrogen atom or a substituent.

Abstract: A light-emitting material containing a compound represented by the general formula (1) is capable of achieving an excellent external quantum efficiency on using in an organic light-emitting device. R1 to R8 represent a hydrogen atom or a substituent, provided that at least one of R1 to R8 represents a substituted or unsubstituted carbazolyl group; and Ar1 to Ar3 represent a substituted or unsubstituted aromatic ring or heteroaromatic ring.

Abstract: A compound that emits fluorescence and delayed fluorescence is provided as a material for an organic electroluminescent device of high efficiency, and an organic photoluminescent device and an organic electroluminescent device of high efficiency and high luminance are provided using this compound. The compound of a general formula (1) having a triphenylene ring structure is used as a constituent material of at least one organic layer in the organic electroluminescent device that includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes.

Abstract: A compound that emits fluorescence and delayed fluorescence is provided as a material for an organic electroluminescent device of high efficiency, and an organic photoluminescent device and an organic electroluminescent device of high efficiency and high luminance are provided using this compound. The compound of a general formula (1) having a diazatriphenylene ring structure is used as a constituent material of at least one organic layer in the organic electroluminescent device that includes a pair of electrodes, and one or more organic layers sandwiched between the pair of electrodes.

Abstract: The compound represented by the following general formula is useful as a light emitting material. Ar1 represents an arylene group, Ar2 and Ar3 represent an aryl group, and R1 to R8 represent a hydrogen atom or a substituent, provided that at least one of R1 to R8 represents a diarylamino group.

Abstract: A compound represented by D-A-D is useful as a light emitter for an organic electroluminescent device:

Abstract: An organic light emitting device containing a compound represented by the following general formula in a light emitting layer have a high light emission efficiency. In the general formula (1), R1 and R2 represent carbazolyl, aryl, heteroaryl, alkyl or cycloalkyl; R5 and R6 represent alkyl; R7, R8 and R9 represent aryl, alkyl or carbazolyl; R10 represents carbazolyl which may be substituted with carbazolyl, aryl, heteroaryl, alkyl or cycloalkyl; n1, n2, n6 and n7 represent an integer of from 0 to 4; n5 represents an integer of from 0 to 3; n8 and n9 represent an integer of from 0 to 5; and n10 represents 0 or 1.

Abstract: To provide a material useful as a light emitting material of an organic light emitting device. A light emitting material comprising a compound represented by the general formula (1) wherein X represents O, S, N—R11, C?O, C(R12)(R13), or Si(R14)(R15); Y represents O, S, or N—R16; Ar1 represents a substituted or unsubstituted arylene group, and Ar2 represents an aromatic ring or a heteroaromatic ring; and R1 to R8 and R11 to R16 each independently represent a hydrogen atom or a substituent.

Abstract: An organic light-emitting device having a light-emitting layer containing a compound represented by the general formula below has a high light emission efficiency. In the general formula, at least one of R1 to R5 represents a cyano group, at least one of R1 to R5 represents a 9-carbazolyl group, a 1,2,3,4-tetrahydro-9-carbazolyl group, a 1-indolyl group or a diarylamino group, and the balance of R1 to R5 represents a hydrogen atom or a substituent.

Abstract: A compound represented by the general formula (1) is useful as a light-emitting material. In the general formula (1), Ar1 to Ar3 represent an aryl group, provided that at least one thereof represents an aryl group substituted by a group represented by the general formula (2). In the general formula (2), R1 to R8 represent a hydrogen atom or a substituent; Z represents O, S, O?C or Ar4—N; and Ar4 represents an aryl group.