The Research On Polarization Mechanism And Dielectric Properties Of ZnO-Nano

Zinc Oxide crystal has three structures: six edge wurtzite structure, cubic sphaleritestructure and octahedral structure, and one of the most stable structure is wurtzite structurewhich is the most common structure. This thesis mainly studies the wurtzite zinc oxide inthe photoelectric properties of nanometer level. Zinc oxide is direct boradgapsemiconductor that exciton binding energy is higher, which makes it has a goodapplication in electronics and photoelectric technology. In recent years, with thedevelopment of science and technology, zinc oxide nanomaterial are moving in thedirection of diversification. What is more important is that the ZnO nanostructure hasunique performance in physical polarization and optical properties. This has become aninspiration for researchers who develop zinc oxide nanomaterial study. In this paper,according to the theory of solid knowledge, we studied the material simulation results andanalyzed nanomaterial polarization mechanism and dielectric property.Through the CASTEP module of Materials Studio software, the paper calculatedelectronic properties, energy band structure,optical properties and the basic materialphysical properties of the ZnO nanostructures. Based on many previous studies, it alsoemphasizes to calculat and analyse the optical performance of the ZnO nanostructures. Atthe same time, we discussed the difference and contact about the polarization rate anddielectric constant between nanowires structure and the crystal structure of ZnO.The main research contents are as follows:First of all, the paper described the research background of the ZnO crystal and nanomaterials briefly, and enumerated some important structural parameters of the ZnO crystal.In addition, this paper also introduced the current situation of research and application ofthe ZnO nanomaterial, and puts forward the research purpose and meaning.Secondly, this paper detailedly described the unique optical and mechanicalproperties of ZnO nanometer material, and introduced the technology of preparation ofZnO nanomaterial. We established the related model of ZnO nanostructures by using MSsoftware simulation, and through the primary principle,the paper analyzed and calculated the band and optical properties of simulation material.Finally, in ZnO nanowires polarization mechanism aspect, In the use of solid physicsknowledge to calculate the date by primary principle. we study the temperaturedependence of molecular polarization rate and the relative dielectric constant of nanowires.Then we compared nanowires with the crystal structure, and analyzed the causes of theseresults.