Mg-doped antimony sulfide-based thin-film solar cell and preparation method thereof

The invention discloses a Mg-doped antimony sulfide-based thin-film solar cell, which sequentially comprises a transparent conductive substrate, an electron transport layer, a light absorption layer and a metal electrode from bottom to top. The light absorption layer is in the form of a Mg-doped antimony sulfide thin film. The invention also provides a preparation method of the Mg-doped antimony sulfide-based thin-film solar cell. The preparation method comprises the following steps: (1) cleaning and drying the oxide transparent conductive substrate; (2), preparing the electron transport layer; (3) preparing the light absorption layer: spin-coating the electron transport layer with the antimony sulfide precursor solution containing the Mg element, and heating to generate Mg-doped antimonysulfide; repeating the steps of spin coating and heating reaction to adjust the thickness of the Mg-doped antimony sulfide film; annealing in an inert gas environment to crystallize the Mg-doped antimony sulfide film to obtai