MoO3/MoS2/LiF flexible heterojunction solar cell and preparation method thereof

The invention discloses a MoO3/MoS2/LiF flexible heterojunction solar cell and a preparation method thereof. The solar cell comprises a polyimide (PI) flexible substrate, an Al back pole, a MoO3 hole transport layer, a MoS2 electron hole excitation layer, a LiF electron transport layer, a graphene transparent conductive layer and an Al gate. The MoO3 layer is prepared through a solution method at low temperature, which facilitates mass production in large area. The MoS2 is formed by in-situ vulcanization through a CVD method. The MoO3 layer is annealed to reduce interface defects between the MoO3 hole transport layer and the MoS2 layer. Interface contamination is reduced. Through the heat radiation evaporation LiF layer and the thin hole transport layer and electron transport layer, the series resistance is reduced on the one hand, and on the other hand the great flexible heterojunction solar cell is formed with the MoS2, graphene and other two-dimensional layered materials. The MoO3/MoS2/LiF flexible heterojunction solar cell has the advantages of low temperature preparation, simple process, low cost, high photoelectric conversion efficiency, wide application range and the like.