Preparation of zinc and cerium or both doped Cu2O photoelectric material via hydrothermal method

In the paper, the zinc and cerium or both doped cuprous oxide (Cu 2 O) crystals were successfully synthesized under low temperature by a simple hydrothermal process. The surface morphologies, structure properties, and optical properties of Cu 2 O crystals were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV-visible absorption spectroscopy. The morphology of pure Cu 2 O crystals, Zn:Cu 2 O crystals, Ce:Cu 2 O crystals and Zn/Ce:Cu 2 O crystals evolved to irregularly cubic structure, exfoliated octahedron, were regular octahedron, and like-spherical aggregate, respectively. The doping of Cu 2 O crystals not only affected the surface morphologies but also significantly influenced the optoelectronic properties. Compared with undoped cuprous oxide, the doped samples had larger optical band gaps. Finally, the aggregation and diffusion were the most important factors for the morphology evolution of Cu 2 O crystal.