Self-coated perovskite absorption layer containing 2D composite functional material and upright structure solar cell

The invention provides a self-coated perovskite absorption layer containing a 2D composite functional material and a solar cell with an upright structure, and belongs to the technical field of semiconductor functional materials.According to the method, in the perovskite Van der Waals curing process, black phosphorus-graphene oxide composite nanosheets (BP-GO NSs) are selected as an additive to treat the surface of a perovskite precursor; by means of the strong chemical bond effect between BP-GO NSs and uncoordinated ions of perovskite, crystal crystallization is delayed, grain growth is promoted, deep energy level defects are passivated in a targeted mode, meanwhile, the BP-GO NSs are stably attached to the grain boundary and the surface of the perovskite, and a high-quality and high-stability absorption layer with all grains of the perovskite coated with BP-GO NSs is formed. According to the structure, the electronic property, the energy band structure and the charge dynamics of the absorption ...