▎ 摘　　要

NOVELTY - The device has a three-level perovskite tandem solar cell system located at a front and a lithium-sulfur battery system located at a rear. The three-level perovskite tandem solar cell system includes perovskite cells with different band gaps in the front, middle and rear. A conductive glass layer, electron transport layer, front perovskite absorber layer, hole transport layer, conductive oxide, middle perovskite absorber layer, conductive oxide material, rear perovskite absorber layer and metal electrode are arranged from bottom to top, in the three-level perovskite tandem solar cell system. The lithium-sulfur battery system includes a sulfur-carbon positive electrode, a separator and a lithium metal negative electrode. The three-level all-perovskite solar cell in the front is connected with the lithium-sulfur battery in the rear through a dense common electrode. USE - Integrated device for three-level perovskite tandem solar cell-energy storage battery. ADVANTAGE - The third-level perovskite solar cell is connected in series with the lithium-sulfur battery, and the voltage is matched with the voltage of the lithium-sulfur battery, so that the redox reaction is carried out more completely. The integrated device also adopts lithium fluoride i as the interlayer between the perovskite and carbon-60, which improves the open circuit voltage of the solar cell portion and delays the degradation of the perovskite. The device is beneficial to the efficient energy conversion of the tandem device and improves its overall stability and service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing three-level perovskite tandem solar cell-energy storage battery integrated device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic structural diagram of the integrated device for three-level perovskite tandem solar cell-energy storage battery. (Drawing includes non-English language text)