Perovskite solar cell and manufacturing method thereof

The embodiment of the invention discloses a perovskite solar cell and a manufacturing method thereof. The method comprises steps: a zinc oxide layer is formed on a transparent substrate; the substrate with the zinc oxide layer formed is placed in a growth solution for reaction, and an aluminum-doped zinc oxide nanorod layer grows and is formed on the zinc oxide layer; an aluminium oxide layer is formed on the aluminum-doped zinc oxide nanorod layer; a perovskite light sensitive layer is formed on the aluminium oxide layer; a hole transport layer is formed on the perovskite light sensitive layer; and a back electrode layer is formed on the hole transport layer. in the embodiment of the invention, the aluminum-doped zinc oxide nanorod layer serves as an electron transport layer, and a large surface area and a good electron transport ability are provided; the aluminium oxide layer is formed on the aluminum-doped zinc oxide nanorod layer to serve as a modified barrier layer, and defects of the zinc oxide nanorod can be improved; and thus, the photoelectric conversion efficiency of the perovskite solar cell based on the aluminum-doped zinc oxide nanorod can be improved.