Abstract: The present disclosure relates to a silicon/perovskite tandem solar cell and a preparation method thereof and belongs to the technical field of perovskite tandem cells. The silicon/perovskite tandem solar cell includes a silicon bottom cell and a perovskite top cell, in which a seed crystal silicon layer and a tunneling layer are sequentially arranged between a surface of the silicon bottom cell and a bottom surface of the perovskite top cell, the seed crystal silicon layer being adjacent to the silicon bottom cell, and the tunneling layer being adjacent to the perovskite top cell. Here, the seed crystal silicon layer is an amorphous silicon layer, and the tunneling layer is a doped microcrystalline silicon oxide layer. The cell facilitates the tunneling between the silicon bottom cell and the perovskite top cell, thereby improving the open circuit voltage and the conversion efficiency of the cell.

Abstract: A maintenance tool for an insulator of a direct current transmission line comprises clamping devices and a tensioning device. The clamping devices are mounted at the two sides of the insulator through clamping, and the tensioning device is connected between the clamping devices. The clamping devices comprise a closed clamp (1), a single serial clamping device (2) and a wire end clamping device (30). The clamping device has advantages such as strong overall strength and bearing capacity, small size, light weight, and reliable working, and can be applied to replacement of various insulators on the direct current transmission line, reliably ensuring safe commissioning and regular maintenance of transmission lines.

Abstract: A maintenance tool for an insulator of a direct current transmission line comprises clamping devices and a tensioning device. The clamping devices are mounted at the two sides of the insulator through clamping, and the tensioning device is connected between the clamping devices. The clamping devices comprise a closed clamp (1), a single serial clamping device (2) and a wire end clamping device (30). The clamping device has advantages such as strong overall strength and bearing capacity, small size, light weight, and reliable working, and can be applied to replacement of various insulators on the direct current transmission line, reliably ensuring safe commissioning and regular maintenance of transmission lines.