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. , R1 and R2 are fluorine or a substituted silyl, etc., n1 and n2 are an integer of 0-5, and R3 is an alkyl, etc.)
本发明通过使用具有
萘基和苯基或杂芳基的二芳基
氨基取代的苯并
芴化合物作为有机电致发光器件的发光层材料,例如通式(1)表示的苯并
芴化合物,能够在保持低驱动电压和良好色纯度的同时提供具有优异器件寿命的发光器件。(式中:Ar 是苯基、杂芳基等;R1 和 R2 是
氟。R1 和 R2 是
氟或取代的
硅基等,n1 和 n2 是 0-5 的整数,R3 是烷基等)。