The IV semiconductor materials have a pivotal role in photovoltaic (PV) systems. Research on the optimal grating structure has attracted a lot of interest because of its potential application in light-trapping in thin film PV cells. The Photonic Crystals (PCs) with their nano-engineered feature which allowed them to obtain high efficiency solar cells in particular from a parametric aspect. By using the Rigorous Coupled Wave Analysis (RCWA) method by RSoft CAD software, a Gallium arsenide (GaAs) thin film is studied with a simple trapezoidal grating of PCs to improve optical absorption with height, width and the mixed ultra-precision grating variations taking into account the J-V solar cell characteristics. According to our simulation results and compared to the planar grating, an enhancement in the power conversion efficiency (η) of 53.72% with a one dimensional PCs grating, and a 115.36% improvement with a simple trapezoidal grating. Furthermore, by mixing the ultra-precision values of the gratings we have an enhancement of 147.25% in height variation and 151.04% in width variation, with a noticeable improvement in the width effect compared to the height that reached up to 58.22%.

IV半导体材料在光伏（PV）系统中具有关键作用。最佳光栅结构的研究因其在薄膜光伏电池中的光捕获方面的潜在应用而引起了很多兴趣。具有纳米工程特征的光子晶体 (PC) 使他们能够获得高效太阳能电池，特别是从参数方面。通过使用 RSoft CAD 软件的严格耦合波分析 (RCWA) 方法，研究了具有简单梯形 PC 光栅的砷化镓 (GaAs) 薄膜，以提高光吸收随高度、宽度和混合超精密光栅变化的变化。考虑到合资太阳能电池的特性。根据我们的模拟结果并与平面光栅相比，功率转换效率的提高（η ) 为 53.72%，使用一维 PCs 光栅，使用简单梯形光栅提高 115.36%。此外，通过混合光栅的超精密值，我们的高度变化和宽度变化分别提高了 147.25% 和 151.04%，与达到 58.22% 的高度相比，宽度效果有了显着改善。