Comparison of two synthesis processes via low-cost chemical bath techniques for CuO films on ITO

In this work, a comparative study between two routes to synthesize copper oxide (CuO) is reported. CuO films are grown on transparent indium-tin-oxide (ITO) substrates by means of two low-cost chemical bath deposition (CBD) techniques using aqueous solutions of copper chloride. It is shown that CuO films can be simply obtained by dehydration of Cu(OH)2, and that the composition of the grown films significantly depends on temperature and process time. The samples obtained with the best route were optically characterized using UV-Vis spectrophotometry, Raman spectroscopy, and scanning electron microscopy.