Li Yiming, Lee Ming-Yi, Cheng Hui-Wen, Lu Zheng-Liang
Parallel and Scientific Computing Laboratory, Department of Electrical Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 300, Taiwan.
Nanoscale Res Lett. 2012 Mar 23;7(1):196. doi: 10.1186/1556-276X-7-196.
In this study, we investigate the reflectance property of the cylinder, right circular cone, and square pyramid shapes of silicon nitride (Si3N4) subwavelength structure (SWS) with respect to different designing parameters. In terms of three critical factors, the reflectance for physical characteristics of wavelength dependence, the reflected power density for real power reflection applied on solar cell, and the normalized reflectance (reflected power density/incident power density) for real reflectance applied on solar cell, a full three-dimensional finite element simulation is performed and discussed for the aforementioned three morphologies. The result of this study shows that the pyramid shape of SWS possesses the best reflectance property in the optical region from 400 to 1000 nm which is useful for silicon solar cell applications.
在本研究中，我们针对不同设计参数，研究了氮化硅（Si3N4）亚波长结构（SWS）的圆柱、直圆锥和方锥形状的反射特性。就波长依赖性物理特性的反射率、应用于太阳能电池的实际功率反射的反射功率密度以及应用于太阳能电池的实际反射率的归一化反射率（反射功率密度/入射功率密度）这三个关键因素而言，对上述三种形态进行了完整的三维有限元模拟并展开讨论。本研究结果表明，SWS的金字塔形状在400至1000nm的光学区域具有最佳反射特性，这对硅太阳能电池应用很有用。
