Solar cell and preparation method thereof, power utilization device and energy storage device

The invention discloses a solar cell and a preparation method thereof, a power utilization device and an energy storage device. The preparation method of the solar cell comprises the following steps: providing a first electrode; preparing a first transmission layer on one side of the first electrode; etching the surface of one side, far away from the first electrode, of the first transmission layer to form an uneven rough surface; forming a perovskite light absorption layer on the rough surface; preparing a second transmission layer on one side, far away from the first transmission layer, of the perovskite light absorption layer; and preparing a second electrode on one side, far away from the perovskite light absorption layer, of the second transmission layer. According to the scheme of the invention, the surface of the first transmission layer is etched, so that the surface of the first transmission layer generates an uneven structure, the bonding strength of the first transmission layer and the perovskite light absorption layer is enhanced, the contact area of the first transmission layer and the perovskite light absorption layer is increased, and the carrier extraction effect of the first transmission layer is improved. And the photoelectric conversion efficiency of the solar cell is improved.