藉由不平整表面散射提升熱輻射吸收率，已被視為改善太陽能板效能的成功關鍵之一，而隨機粗糙表面因製作方式多元、成本較次波長週期結構低廉的優點，更具備高度產業價值。然而，粗糙表面施用於以矽為主的商用太陽能板仍存在兩困難：一是矽非等向性晶格使高度自相關函數不再是高斯函數，故少有文獻探討；二是常見之化學或高溫製作方式，會破壞太陽能板電極或摻雜離子分佈。因此，本研究以單晶矽為對象，目標則是以純物理方式製作一維隨機粗糙表面，呈現波長405 nm下之散射特性，作為粗糙表面提升太陽能板吸收率潛力之初探。
本研究主要成果與貢獻包括：一、利用機構往復運動，開發出一維粗糙表面研磨機；二、以不同號數砂紙，在單晶矽上製作出不同高度標準差及相關長度之隨機粗糙表面，便於量化探討散射特性；三、以貝索級數將單晶矽表面高度自相關函數彌合成貝索表面，也能模擬其散射特性；四、量測矽、金、鋁等不同材料粗糙表面之雙方向反射密度函數，實驗與模擬結果呈現相同之特徵與趨勢，也支持利用粗糙表面應用於太陽能板吸收率之提升的想法，尤其是在橫電場波小角度入射時，樣本吸收率較高斯型式及平坦表面高，具有增加太陽能板效能的潛力。

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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