Study On Synthesis And Physical Properties Of InAlO₃（ZnO）₁₅ Superlattice Nanobunches

In recent years, scientists have paid more attention on nanometerscale materials. Among them, semiconductor zinc oxide (ZnO) with direct wide band gap (Eg=3.37eV) has attracted considerable attention. Through control of the shape and structure or doping appropriately in ZnO to improve the physical properties. Doping appropriately in ZnO (such as group ⅢandⅤ elements doped ZnO) can enable it transform into p-type conduction and increase the carriers’concentration. They both control of shape improve its optical and electrical properties. We all know that control of shape may improve nanometerscale materials optical and electrical properties, too. However, in order to further increase the UV luminous efficiency, superlattices which contain periodic compositional and structural features, have attracted extensive attention for the past few years.In this thesis, we have synthesized In-Al codoped ZnO nanobunches and InAlO3(ZnO)15superlattice nanobunches by a simple vapor phase transport method. The morphologies and structure of samples were characterized by using scanning electron microscopy、X-ray diffraction and transmission electron microscopy. The transmission electron microscopy image shows that periodic layered structure of the nanowires can be clearly obtained, and nanoplatets regularly arrayed along the direction of growth. Moreover, the optical properties and the electrical properties of the InAlO3(ZnO)15superlattice nanobunches are the key research. A possible growth mechanism has been discussed and a nonlinear I-V characteristic is found.