| 摘要 |
The present invention is capable of providing a light emitting device with excellent device lifetime while maintaining low driving voltage and good color purity by using a benzofluorene compound which is substituted with a diaryl amino group having a naphthyl and a phenyl or a heteroaryl and which is represented by general formula (1) as a material for luminescent layers of an organic electroluminescent device, for example. (In the formula, Ar is a phenyl, a heteroaryl, etc. , R 1 and R 2 are fluorine or a substituted silyl, etc., n1 and n2 are an integer of 0-5, and R 3 is an alkyl, etc.) |
