The role of diethanolamine (DEA) as a chelating agent was investigated in a fluorine-free precursor solution for the growth of superconducting YBa₂Cu₃O₇ (YBCO) thin films via chemical solution deposition. Infrared spectroscopy and thermal analyses were employed to elucidate the interactions between the chelating agent and propionate-based coating solution. The physical properties of the as-obtained YBCO films were investigated to assess the effect of DEA addition on film growth. Special emphasis was placed on the determination of superconducting transport properties. These have been investigated in wide magnetic field (0–18 T) and temperature (4.5–77 K) ranges to account for various possible application scenarios. The 100 nm thick YBCO film deposited on a (001) SrTiO₃ single-crystal substrate exhibited a critical current density of 4 MA cm⁻² at 77 K in self-field.

中文翻译：

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二乙醇胺 (DEA) 作为螯合剂制备无氟丙酸盐路线 YBa2Cu3O7 (YBCO) 薄膜的研究

在无氟前体溶液中研究了二乙醇胺 (DEA) 作为螯合剂对超导 YBa ₂ Cu ₃ O _{7生长的作用}(YBCO) 薄膜通过化学溶液沉积。采用红外光谱和热分析来阐明螯合剂和丙酸盐基涂层溶液之间的相互作用。研究了所获得的 YBCO 薄膜的物理性质，以评估添加 DEA 对薄膜生长的影响。特别强调了超导传输特性的测定。这些已经在宽磁场 (0-18 T) 和温度 (4.5-77 K) 范围内进行了研究，以解决各种可能的应用场景。_{沉积在 (001) SrTiO 3}单晶基板上的 100 nm 厚 YBCO 薄膜在自场 77 K 时表现出 4 MA cm ^{-2的临界电流密度。}