The invention discloses an
organic semiconductor material based on an asymmetric fused heterocycle and a preparation method and application thereof, and belongs to the technical field of
perovskite solar cells, the self-assembled monomolecular layer
organic semiconductor material provided by the invention uses a fused ring as a functional group, and can promote SAM molecules to form a more ordered monomolecular layer which is more tightly stacked. Pinhole defects are reduced; and exposed points on the substrate can be effectively reduced due to better coverage. In addition, by introducing the S heterogen, a surface
work function and an interface
dipole can be effectively regulated and controlled, so that carrier transmission is promoted, surface non-radiative recombination is inhibited, the
energy conversion efficiency is effectively improved, and the
photoelectric conversion efficiency of the
perovskite solar cell exceeds 26%. In addition, the material significantly improves the long-term stability of devices, prolongs the service life, provides a new technical scheme for efficient and stable
perovskite solar cells, and has wide application prospects.