Silicon heterojunction solar cells with pyramidal textured surfaces created by different etching conditions and their properties related to device efficiency (short‐circuit current density and open‐circuit voltage) are studied. An easy‐to‐apply model is proposed to estimate reflection losses, optimize the multilayer structure of the solar cell, and enhance photovoltaic conversion efficiency. The effects of etching treatments and pyramid geometry on overall device performance are discussed in detail. The study is completed by measurement of pyramid vertex angles of different textures. A difference from the expected and generally accepted theoretical value of 70.52° is demonstrated and explained based on observation from high‐resolution transmission electron microscopy. The multilayer structure of silicon heterojunction solar cells is optimized with respect to various pyramid vertex angles, using the designed optical model to minimize absorption and reflection losses.

中文翻译：

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金字塔纹理硅异质结太阳能电池的光学特性和性能：顶角的关键作用

研究了具有不同刻蚀条件的金字塔形表面硅异质结太阳能电池及其与器件效率（短路电流密度和开路电压）有关的特性。提出了一种易于应用的模型来估计反射损耗，优化太阳能电池的多层结构并提高光伏转换效率。详细讨论了蚀刻处理和金字塔几何形状对整体器件性能的影响。该研究是通过测量不同纹理的金字塔顶角来完成的。基于高分辨率透射电子显微镜的观察结果，证明并解释了与预期的和普遍接受的70.52°理论值之间的差异。