Conventionally the fabrication of superconducting thin films is carried out by tedious processes and requires expensive equipment. Here we report the growth of YBa2Cu3O7-x (YBCO) thin films on SrTiO3 substrates by the low-cost chemical solution deposition technique . The preparation includes the precipitation of yttrium, barium and copper acetates in oxalic acid; and directly dripping onto SrTiO3 ( orientation) substrates. The epitaxial growth of the deposited layer was carried out by calcination and thermal treatments at 840 and 860 °C. The surface morphology was inspected by optical microscopy. X-ray diffraction (XRD) confirms the preferential epitaxial growth (00l) of the YBCO crystallites, especially after thermal treatment at 860 °C. Both samples show a superconducting critical temperature of 90 K. The estimation of the critical current density (JC) of the samples was measured indirectly from their respective hysteresis cycles following the Bean equation  at 10 K. For the sample treated at 840 °C, JC was 19 x 104 A/cm2, while for the sample obtained at 860 °C JC was 17 x 109 A/cm2, indicating that a thermal treating of 840 °C is enough to obtain a versatile YBCO thin film.
 Yuanqing Chen et al. (2016). High Critical Current Density of YBa2Cu3O7−x Superconducting Films Prepared through a DUVassisted Solution Deposition Process. Scientific Reports. DOI: 10.1038/srep38257.
 J. Narayan, A. Bhaumik y R. Sachan., Journal of Applied Physics Vol 123 2018 135304.