Organic light-emitting device, and light-emitting material and compound used therefor

An organic light-emitting device comprising a substrate having thereon a light-emitting layer containing the light-emitting material which comprises a compound represented by the following general formula (1):

• wherein in the general formula (1), at least one of R1 to R5 represents a cyano group, at least one of R1 to R5 represents a group represented by the following general formula (11), and the balance of R1 to R5 represents a hydrogen atom or a substituent;
• wherein in the general formula (11), R21 to R28 each independently represent a hydrogen atom or a substituent, provided that at least one of the following requirements (A) and (B) is satisfied:
• (A) R25 and R26 jointly form a single bond, and
• (B) R27 and R28 jointly form an atomic group that is required for forming a substituted or unsubstituted benzene ring.

A delayed fluorescent emitter having a structure represented by the following general formula (1):

• wherein in the general formula (1), at least one of R1 to R5 represents a cyano group, at least one of R1 to R5 represents a group represented by the following general formula (11), and the balance of R1 to R5 represents a hydrogen atom or a substituent;
• wherein in the general formula (11), R21 to R28 each independently represent a hydrogen atom or a substituent, provided that at least one of the following requirements (A) and (B) is satisfied:
• (A) R25 and R26 jointly form a single bond, and
• (B) R27 and R28 jointly form an atomic group that is required for forming a substituted or unsubstituted benzene ring.