Abstract Antimony sulphide (Sb2S3) thin films have attracted considerable research interest as a photovoltaic absorber material owing to their suitable band gap, large absorption coefficient, and excellent photoelectronic properties. In this study, cadmium sulphide (CdS) films were doped with potassium, which increased their crystallinity and optical transmission. These films were then used as a buffer layer to increase the efficiency of Sb2S3 solar cells. Furthermore, the potassium diffused into the Sb2S3 film, which increased their crystallinity and light absorption and decreased its surface roughness. Dual-functional potassium doping helped improve all of the photoelectric parameters of the Sb2S3 solar cells. Specifically, the device efficiency increased from 4.57% to 6.53% (an increase of 42.89%), and a high current density of 15.29 mA cm−2 was achieved. These findings are expected to facilitate the further development of Sb2S3 thin-film solar cells for industrial applications.

中文翻译：

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使用双功能钾掺杂提高 Sb2S3 太阳能电池的效率

摘要 硫化锑（Sb2S3）薄膜作为一种光伏吸收材料，由于其合适的带隙、大的吸收系数和优异的光电性能而引起了广泛的研究兴趣。在这项研究中，硫化镉 (CdS) 薄膜掺杂了钾，这增加了它们的结晶度和光传输。然后将这些薄膜用作缓冲层以提高 Sb2S3 太阳能电池的效率。此外，钾扩散到 Sb2S3 薄膜中，增加了它们的结晶度和光吸收，并降低了其表面粗糙度。双功能钾掺杂有助于改善 Sb2S3 太阳能电池的所有光电参数。具体来说，器件效率从4.57%提高到6.53%（提高了42.89%），电流密度高达15。达到了 29 mA cm-2。这些发现有望促进用于工业应用的 Sb2S3 薄膜太阳能电池的进一步开发。