The crystal growth of chemical vapor deposition zinc sulphide bulk materials

The film and bulk material of zinc sulphide were prepared by chemical vapor deposition. The nucleation and the growth of zinc sulphide crystals deposited on the graphite and quartz substrates with different roughness were observed. The grains of zinc sulphide deposited on the substrate surface are very fine, with equiaxial shape, and then grow up into columnar shape. The roughness of the substrate surface influences the nucleation density of zinc sulphide but has no effect on the growth rate of zinc sulphide crystal in the thickness direction. The thickness of zinc sulphide nearly increases with incresing the deposition time. The growth rate of zinc sulphide increases with increasing the flow of H₂S and vapoured Zn. The growth rate exhibits maxium value at a given deposition temperature.