MICROMORPHOLOGICAL STUDIES ON THE ZNSE SINGLE-CRYSTALS GROWN BY CHEMICAL-VAPOR TRANSPORT TECHNIQUE

Single crystals of ZnSe have been grown by chemical vapour transport t echnique. Microscopic observation of crystal surfaces has been carried out using optical microscope and scanning electron microscope (SEM). Different micromorphological patterns such as microsteps, spirals and kinks were observed on the surface of the grown crystals in different growth conditions. Present studies show that the formation of these mi crostructures on the surface of the grown crystals depends on the grow th parameters such as undercooling and stability of the growth interfa ce. The morphology and lattice parameters of the grown crystals have a lso been determined by X-ray analysis.