The optical properties of a textured antireflective coating (ARC) polymeric film are engineered by combining the down-conversion effect of large phosphor particles and the multiple scattering effect of SiO₂ nanoparticles. In order to address the parasitic absorption of ultraviolet (UV) light, phosphors are added to convert UV light to visible light. However, the embedded phosphors increase the reflectance of the ARC film, due to the large particle size (>5 µm) and high refractive index (n ≈ 1.9) of phosphors. Such a backward scattering problem of phosphors is compensated by adding spherical SiO₂ nanoparticles. Experimental and computational results show that SiO₂ nanoparticles in the ARC film decrease the reflectance by increasing the diffuse transmittance. This optically engineered ARC film successfully promotes the light absorption of the perovskite/silicon tandem solar cell, leading to the improvement of power conversion efficiency of the tandem cell from 22.48% to 23.50%.

中文翻译：

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通过 SiO2 纳米颗粒和磷光体的混合物通过光散射和紫外下移提高钙钛矿/硅串联太阳能电池的光吸收

通过结合大荧光粉颗粒的下转换效应和 SiO ₂纳米颗粒的多重散射效应来设计纹理化抗反射涂层 (ARC) 聚合物薄膜的光学特性。为了解决紫外 (UV) 光的寄生吸收问题，添加了荧光粉以将紫外光转换为可见光。然而，嵌入的荧光粉增加了 ARC 薄膜的反射率，这是由于荧光粉的粒径大（>5 µm）和折射率高（n  ≈ 1.9）。_{通过添加球形SiO 2}纳米颗粒来补偿荧光粉的这种后向散射问题。实验和计算结果表明，SiO ₂ARC薄膜中的纳米颗粒通过增加漫透射率来降低反射率。这种光学设计的 ARC 薄膜成功地促进了钙钛矿/硅串联太阳能电池的光吸收，从而将串联电池的功率转换效率从 22.48% 提高到 23.50%。