Sb₂S₃ is a new kind of photovoltaic material that is promising for practical application in solar cells owing to its suitable bandgap, earth‐abundant elements, and excellent stability. Here, we report on an aqueous‐solution‐based approach for the synthesis of Sb₂S₃ films from easily accessible Sb₂O₃ as antimony source. In this reaction, 3‐mercaptopropionic acid was applied as both solvent and sulfur precursor, aqueous ammonia was employed as a solvent. After simple annealing at a temperature as low as 270 °C, the spin‐coated precursor solution can generate compact, flat, uniform, and well‐crystallized Sb₂S₃ film. Mechanistic study showed that the formation of Sb‐complex with ammonium carboxylates leads to the successful dissolution of Sb₂O₃ powder. A suitable annealing process was able to generate carbon‐free Sb₂S₃ films. Planar heterojunction solar cell based on the as‐prepared Sb₂S₃ film delivered a power conversion efficiency of 5.57 %, which is the highest efficiency of solution‐processed planar heterojunction Sb₂S₃ solar cells and a high value in all kinds of Sb₂S₃ solar cells. This research provides a convenient approach for the fabrication of device‐quality Sb₂S₃ films, and highlights solution processing of carbon‐free metal chalcogenide thin films as a suitable process for application in optoelectronic devices.

中文翻译：

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基于水溶液的方法实现高效太阳能电池用无碳Sb2S3薄膜

Sb ₂ S ₃是一种新型的光伏材料，由于其合适的带隙，丰富的地球元素以及出色的稳定性，有望在太阳能电池中得到实际应用。在这里，我们报告了一种基于水溶液的方法，该方法由易于获得的Sb ₂ O ₃作为锑源来合成Sb ₂ S ₃膜。在该反应中，将3-巯基丙酸用作溶剂和硫前体，并使用氨水作为溶剂。在低至270°C的温度下简单退火后，旋涂的前驱体溶液可以生成致密，平坦，均匀且结晶良好的Sb ₂ S ₃电影。机理研究表明，与羧酸铵形成Sb-络合物可成功溶解Sb ₂ O ₃粉末。适当的退火工艺能够生成无碳的Sb ₂ S ₃膜。基于制备的Sb ₂ S ₃膜的平面异质结太阳能电池的功率转换效率为5.57％，这是固溶处理的平面异质结Sb ₂ S ₃太阳能电池的最高效率，并且在各种Sb中都具有很高的价值₂ S ₃太阳能电池。这项研究为制造高质量的器件Sb ₂提供了一种方便的方法。S ₃膜，重点介绍了无碳金属硫属化物薄膜的固溶处理，是在光电器件中应用的合适方法。