Properties of ZnO grown on sapphire with different buffer layers

Morphology and Growth Process of Bat-like ZnO Crystals by Thermal Evaporation

“…Many groups proposed that grain size, crystal structure, and surface morphology could significantly influence the optical, electrical and other properties, so considerable efforts have been devoted to the synthesis of various ZnO nanostructures. For example, Wu et al demonstrated that ZnO nanostructures grown on different buffer layers exhibited different crystalline qualities, and optical properties, and it was proposed that stresses and threading dislocations between ZnO films and substrates could be released and reduced by different buffer layers to different degrees [5]. Lv et al investigated the effect of solution concentration on microstructure, surface morphology and optical band gap of ZnO thin films by hydrothermal method, also prepared a typical tower-like ZnO thin film composed of many ZnO nanosheets from 0.08 mol/L solution [6].…”