Perovskite solar cell and manufacturing method thereof

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a perovskite solar cell and a manufacturing method thereof. Background technique [0002] In recent years, perovskite solar cells have developed rapidly, and their photoelectric conversion efficiency has exceeded 20%. Few solar cells can achieve such high efficiency in such a fast time. The electron transport layer material of perovskite solar cells is generally TiO 2 and ZnO. In general, the electron transport ability of ZnO is better than that of TiO 2 Therefore, ZnO-based perovskite solar cells have received extensive attention recently. [0003] Due to the large specific surface area of ​​ZnO nanorods, ZnO nanorods have become the electron transport layer of perovskite solar cells widely used, but because ZnO nanorods have many defects, such as zinc vacancy defects, oxygen vacancy defects and composite defects, etc., so The current efficiency of perovskite solar cel...

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Problems solved by technology

[0003] Due to the large specific surface area of ​​ZnO nanorods, ZnO nanorods have become the electron transport layer of perovskite solar cells widely used, but because ZnO nanorods have many defects, such as zinc vacancy defects, oxygen vacancy defects and composite defects, etc., so The current efficiency of perovskite solar cells based on ZnO nanorods can only reach about 15%.

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