NOVELTY - A selective emitter junction solar battery preparing method involves making texture for a silicon wafer with mixed chemical corrosion solution. The silicon wafer is placed in a furnace. The silicon wafer is irradiated and ablated to form an emitter junction. An edge of the silicon wafer is etched with the corrosion solution. The silicon nitride plated antireflection membrane treatment is carried out on the silicon wafer. A grid line electrode is formed on a front face of a silicon chip. The silicon wafer is placed in a rapid sintering furnace to obtain a finished product.    USE - Method for preparing a selective emitter junction solar battery.    DETAILED DESCRIPTION - A selective emitter junction solar battery preparing method involves making a texture for a silicon wafer with mixed chemical corrosion solution, which is prepared from nitric acid (8%), hydrofluoric acid (30%) and water, and removing a polycrystalline silicon chip surface damage layer. The silicon wafer is placed in a 820-type diffusion furnace at 8 degrees C and diffused with a phosphorus oxychloride liquid source to form a phosphorosilicate glass layer on a surface of a silicon chip. The silicon wafer is irradiated and ablated by using a laser with wavelength of 532 nm to form a primary selective emitter junction. Etching solution is prepared by the hydrofluoric acid and the nitric acid (65%) in a ratio of 1: 4 to etch the emitter junction of the silicon wafer. The edge of the silicon wafer is etched with the mixed chemical corrosion solution. The silicon nitride plated antireflection membrane treatment is carried out on the silicon wafer using an enhanced plasma chemical vapor deposition system at 400-500 degrees C for 700-800 seconds. A grid line electrode is formed on a front face of the silicon chip using a silk-screen printing process to form an aluminum-back surface field on a back surface of the silicon wafer. The silicon wafer is placed in a rapid sintering furnace at 25-900 degrees C for sintering and metallization to obtain a finished product.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram illustrating a method for preparing a selective emitter junction solar battery.'(Drawing includes non-English language text)'