Perovskite solar cell based on full-sol-gel process and preparation method thereof

The invention discloses a perovskite solar cell based on a full-sol-gel process and a preparation method thereof. The perovskite solar cell based on the full-sol-gel process includes a conductive glass substrate (14), a metal oxide layer (13), a perovskite film layer (12), a hole transportation layer (11), and a back electrode contact layer (10) sequentially from top to bottom. A conductive thin film is arranged on the conductive glass substrate (14). The back electrode contact layer (10) is an ITO (indium tin oxide) layer and substitutes traditional Au and Ag and the like and at the same time, BaTiO3, ZnO, and SnO2 and the like are used as the metal oxide layer so that it is realized that in a preparation process, the sol-gel process is used so that the manufacturing cost is reduced and at the same time, the preparation process is simplified and large-area manufacturing is facilitated.