The invention discloses a preparation method and application of an AIEgen type self-assembled hole transport material, the AIEgen type self-assembled hole transport material has a structure shown in a general formula (I) or a general formula (II): # imgabs0 #, in which L1 and L2 are independently selected from C2, C3, C4, C5 or C6 linear
alkyl; r1, R2, R3 and R4 are independently selected from-H,-Br,-CF3, methyl, methoxyl, hydroxyl, amino, phenyl or
carboxylic acid group. The self-assembled hole transport material is used in a
perovskite solar device so as to improve the efficiency of the device and improve the stability; the compact and uniform
hole transport layer is obtained, defects are effectively passivated, non-
radiation convergence is reduced, and the performance of the device is improved.