| Summary: | 碩士 === 國立成功大學 === 機械工程學系 === 102 === Surface roughness raises the absorptivity of solar cells be brought to discussion in recent years. The fabrication of rough surfaces has the potential commercial applications of low cost and diverse compared with micro/nano period structures. However the unique crystalline of silicon the main material of solar cells, the fabricated roughness on surfaces will have two problems. First, there are few researches about non-Gaussian rough surfaces according to the unique auto-correlation function. Second, the recent fabrication will destroy the solar cells electrode and doping ions distribution because of chemical or high temperature. Therefore, for the purpose to initially access the promotion of absorptivity this research fabricate the one-dimensional rough surfaces by only physical method and demonstrate the light scattering by the 405 nm laser.
The results and contributions of this research are the following. 1. Develop a one-dimensional polishing machine by Scotch Yoke. 2. Fabricate the different range of height deviation and correlation length roughness on single crystalline silicon with different number of sandpaper. 3. Use the Bessel series to fit the non-Gaussian rough surfaces height auto-correlation function. 4. Measure the bidirectional reflectance density function (BRDF) of rough surfaces of silicon, gold, and aluminum. The measurement and simulation results have the same features and tendency.
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