Abstrait

Influence of physical properties on the growth of ZnO for device application

M.C.Rao

Zinc oxide is an inorganic compound also known as zincite and occurs rarely in nature, generally in a crystalline form. It is usually orange or red in color due to presence of manganese impurity. It usually appears as a white crystalline powder, which is nearly insoluble in water. Most of ZnO which is used commercially is produced synthetically. ZnO is actually a wide bandgap semiconductor of the II-VI semiconductor group. The doping of the semiconductor is n-type which is due to oxygen vacancies. This has several favorable properties like high electronmobility, good transparency, wide bandgap for seni-conductivity, high room-temperature luminescence, etc. These properties are used in applications for electrodes in liquid crystal displays aswell as in energy saving and heat protectingwindows, electronic applications of ZnO as thin-film transistors and light emitting diodes. Because of its unique properties and versatile applications, it is used in transparent electronics, ultraviolet light emitters, piezoelectric devices and chemical sensors.