Cu₂O is attractive as abundant and low‐cost material for energy‐related applications. This study investigated the versatile spray pyrolysis of Cu₂O films from aqueous solutions. The appropriate deposition temperature and amount of copper acetate in the sprayed precursor solution was determined in order to eliminate unwanted copper oxide phases. It was shown that the addition of a reducing agent containing primary/secondary OH‐groups with suitable decomposition properties is necessary in order to obtain copper in the +I oxidation state. The influence of the pH value, determined by the addition of acetic acid to solutions containing varying reducing agents, on the structural film properties, was investigated. D‐sorbitol is for the first time proposed as suitable reducing agent to obtain compact and thick (ca. 500 nm) Cu₂O films with an optical band gap of 2.3 eV.

中文翻译：

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Cu2O薄膜的水喷雾热解：还原剂和乙酸添加的影响

Cu ₂ O以其丰富而低成本的材料吸引了能源相关应用。这项研究调查了Cu ₂的多功能喷雾热解水溶液中的O膜。确定适当的沉积温度和喷雾的前体溶液中乙酸铜的量，以消除不需要的氧化铜相。结果表明，为了获得处于+ I氧化态的铜，必须添加含有具有适当分解性能的伯/仲OH-基团的还原剂。研究了通过向含有不同还原剂的溶液中添加乙酸确定的pH值对结构膜性能的影响。首次提出将D-山梨醇用作合适的还原剂，以获得具有2.3 eV光学带隙的致密且厚（约500 nm）的Cu ₂ O膜。