Study On The Antireflecton Performance Of Monocrystalline Silicon Solar Cells Based On Surface Micro And Nano Structure

Solar energy has been favored by many countries, for its wide distribution of resource,unexhausted, less pollution, simple maintenance and other advantages, there is hope that the solar energy becomes the new generation of the major energy. However, the development of solar cells is limited in the current commercial solar cells, for the high cost of silicon, low conversion efficiency etc. Micro and nanostructure array has unique optical properties, which can effectively guide the transmission of light, and easy to produce, thus providing new ideas for the new generation of solar cells. Based on the background mentioned above, this paper focused on calculations and further study of the impact of different micro and nanostructure arrays on light trapping efficiency of solar cells, by introducing Matlab and Comsol Multiphysics, a software based on the principle of finite element.Firstly, cylindrical arrays, nanocone arrays, and inverted nanocone arrays were designed and constructed on the substrate of silicon by using Comsol Multiphysics simulation software. The reflection and absorption were calculated and compared with the bulk silicon of the same thickness. Meanwhile, the mechanism of the effect of various nanostructures on optical absorption was analyzed based on the effective refractive index theory.Secondly, with nanocone arrays as the benchmark model, nanocone, dome nanocone and hemi-ellipsoidal arrays were constructed. The reflection, the absorption and the mechanisms of the optical absorption were analyzed.Finally, based on the absorption of the calculations, the photoelectric conversion efficiencies of cylindrical, nanocone, and inverted nanocone arrays were calculated and analyzed by using Matlab software. In addition, the efficiencies were compared with the bulk silicon of the same thickness. Meanwhile, the current densities and the photoelectric conversion efficiencies of nanocone, dome nanocone and hemi-ellipsoidal arrays were studied, as well as the effect of the changing nanowire radius on the photoelectric conversion efficiency.