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

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 R 1 to R 5 represents a cyano group, at least one of R 1 to R 5 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 R 1 to R 5 represents a hydrogen atom or a substituent.

1 . An organic light-emitting device comprising a substrate having thereon a light-emitting layer containing a light-emitting material which comprises a compound represented by the following general formula (1): 
       
         
           
           
               
               
           
         
       
       wherein in the general formula (1), at least one of R 1  to R 5  represents a cyano group, at least one of R 1  to R 5  represents a group represented by the following general formula (11), and the balance of R 1  to R 5  represents a hydrogen atom or a substituent; 
       
         
           
           
               
               
           
         
       
       wherein in the general formula (11), R 21  to R 28  each independently represent a hydrogen atom or a substituent, provided that at least one of the following requirements (A) and (B) is satisfied:
 (A) R 25  and R 26  jointly form a single bond, and 
 (B) R 27  and R 28  jointly form an atomic group that is required for forming a substituted or unsubstituted benzene ring.