Study On Surface Texture Of Polycrystalline Solar Panels Constructed By External Field

With the continuous growth of the world's total population and the deepening of economic globalization,the demand for energy in human society is also increasing.On the one hand,fossil energy is exhausted,and on the other hand,the heavy use of fossil fuels causes serious environmental pollution problems.Endanger the survival of mankind.Therefore,vigorously develop new energy sources and look for a green,pollution-free,renewable energy source that is the direction of scientific researchers in various countries.Due to its strong magnetization,the strong magnetic field can make non-ferromagnetic materials also exhibit internal magnetic properties,such as water,plastic,wood,etc.,which can be suspended in a strong magnetic field.Unlike ordinary magnetic fields acting on macroscopic objects,strong magnetic fields can transfer high-strength magnetism to the atomic scale of matter,changing the arrangement,matching and migration of atoms,thus having a profound impact on the organization and material of the material.In the preparation of materials,the magnetic field can control the shape,size,distribution and orientation of the material during its growth,thus affecting the structure of the material,and finally obtaining new materials with excellent properties.The application of solar energy is to use solar cells to convert radiant energy into electrical energy,that is,to perform photoelectric conversion.Therefore,in order to improve the utilization efficiency of solar energy,it is necessary to improve the photoelectric conversion efficiency of solar cells,and to construct a concave-convex structure on the surface of the solar cell,which can reduce the surface of the polysilicon.The light reflectance,and the light can be refracted multiple times,and the optical path is increased,so that the utilization efficiency of the light irradiated on the surface of the solar cell is increased to further improve the photoelectric conversion efficiency of the polycrystalline silicon battery.Therefore,the surface texture of polysilicon is an effective method to improve the photoelectric conversion efficiency of solar cells.There are many ways to texture the surface of polycrystalline silicon.In this paper,the experiment is carried out under the strong magnetic field in combination with the traditional surface texture of polycrystalline silicon sheet.The main contents are as follows:(1)Study the influence of strong magnetic field on the minority carrier lifetime and surface texture of the polycrystalline silicon wafer during the chemical etching process,when the magnetic field direction is parallel to the surface of the polycrystalline silicon wafer,the magnetic field strength is 4T,the magnetic field action time is 10 min,and the magnetic field action temperature is 80°C.The surface of the surface of the polycrystalline silicon sheet has a good surface topography,low reflectivity and good electrical performance.(2)Using the laser etching combined with chemical etching method to construct the surface texture of polycrystalline silicon,the surface of the surface of the polycrystalline silicon sheet is obtained when the laser intensity is 13 A,the repetition frequency is 20 hkz,the laser speed is 40nm/s,and the incident angle is 45°.Good shape,low reflectivity and good electrical performance.(3)Study the surface texture of the laser-etched polycrystalline silicon wafer under chemical magnetic field under the action of strong magnetic field.When the magnetic field strength is 4T,the magnetic field action time is 10 min,and the magnetic field action temperature is 80°C,the surface morphology of the surface structure of the polycrystalline silicon wafer is obtained.Good,with low reflectivity and good electrical performance,and the lowest reflectivity among the three processes.