We report an anti-reflective cover glass for Cu(In,Ga)Se₂ (CIGS) thin film solar cells. Subwavelength structures (SWSs) were fabricated on top of a cover glass using one-step self-masked etching. The etching method resulted in dense whiskers with high aspect ratio. The produced structure exhibited excellent anti-reflective properties over a broad wavelength range, from the ultraviolet to the near infrared. Compared to a flat-surface glass, the average transmittance of the glass integrated with the SWSs improved from 92.4% to 95.2%. When the cover glass integrated with the SWSs was mounted onto the top of a CIGS device, the short-circuit current and the efficiency of the solar cell were enhanced by 4.38 and 6%, respectively, compared with a CIGS solar cell without cover glass.

中文翻译：

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单步自刻蚀制备亚波长结构覆盖玻璃的Cu（In，Ga）Se2太阳能电池。

我们报告了用于Cu（In，Ga）Se ₂（CIGS）薄膜太阳能电池的防反射玻璃盖。使用一步式自掩膜蚀刻，在防护玻璃的顶部制作了亚波长结构（SWS）。蚀刻方法产生具有高纵横比的致密晶须。所产生的结构在从紫外线到近红外的宽波长范围内均显示出优异的抗反射性能。与平面玻璃相比，与SWS集成的玻璃的平均透射率从92.4％提高到95.2％。与没有盖玻片的CIGS太阳能电池相比，将集成了SWS的盖玻片安装到CIGS装置的顶部时，太阳能电池的短路电流和效率分别提高了4.38和6％。