Benzidine derivative, and light-emitting device and electric appliance using the benzidine derivative as the hole transporting material

摘要

According to the present invention, a material that can be used as a hole transporting material is provided. Further, a material that is easily kept in a non-crystalline state and can be used as a hole transporting material is also provided. One embodiment of the present invention is a compound represented by a general formula (1). In the general formula (1), R1 is hydrogen or an alkyl group having 1-4 carbon atoms. Further, one embodiment according to the present invention is a hole transporting material containing the compound represented by the general formula (1).