Efficient Cesium Lead Halide Perovskite Solar Cells through Alternative Thousand-Layer Rapid Deposition

The novel growth of cesium lead halide perovskite thin films, which are prepared through thousand-layer rapid alternative deposition, is performed by developing an active perovskite film consisting of a layer-by-layer structure. This method is considerably more difficult to be implemented from the solution process. The obtained thin film morphology and characteristics are distinguished from that of the traditional a few layers and two-material codeposition. These alternative deposited perovskites are integrated with vacuum-deposited carrier-transporting layers and electrodes, and all vacuum-sublimed perovskite solar cells exhibit an outstanding power conversion efficiency of 13.0%. The use of these devices for environmental light energy harvesting provides a power conversion efficiency of 33.9% under fluorescent light illumination of 1000 lux.