Carbon-based perovskite solar cell based on aluminum oxide/carbon material double-mesoporous layer and preparation method of carbon-based perovskite solar cell

The invention relates to the technical field of solar cells, in particular to a carbon-based perovskite solar cell based on an aluminum oxide/carbon material double mesoporous layer and a preparation method thereof, and the preparation method comprises the following steps: depositing a layer of FTO or ITO conductive film on a glass substrate to form a transparent electrode; preparing a compact inorganic oxide semiconductor layer on the transparent electrode as an electron transport layer; preparing an Al2O3 insulating layer with a mesoporous structure on the electron transport layer; preparing a carbon back electrode layer with a mesoporous structure on the Al2O3 insulating layer; and a perovskite material is grown in pores of the Al2O3 insulating layer and the carbon back electrode layer to serve as a photoactive region, so that the carbon-based perovskite solar cell based on the aluminum oxide/carbon material double-mesoporous layer is obtained. According to the invention, the structure of the carbon-based