2,6-bis(triphenylamine)-4,8-bis(alkoxy)benzo[1,2-b:4,5-b']bithiophene and preparation for same

The invention discloses a hole transport material 2,6-bis(triphenylamine)-4,8-bis(alkoxy)benzo[1,2-b:4,5-b']bithiophene for a perovskite solar cell. The hole transport material has a simple molecular structure, a lateral group to which an aromatic functional group can be introduced, high hole mobility, high efficiency, high electrical conductivity and high dissolubility, and the perovskite solar cell prepared from the hole transport material can be matched with a perovskite energy level. The invention also discloses a preparation method for the hole transport material. The hole transport material for the perovskite solar cell is prepared by an SUZUKI reaction step from raw materials 2,6-dibromo-4,8-bis(alkoxy)benzo[1,2-b:4,5-b']dithiophene and 4-(diphenylamino)phenylboronicacid. The preparation method has the characteristics of simplicity in operation, readily available raw materials, easiness for separation and high yield.