| Summary: | 碩士 === 國立中興大學 === 電機工程學系所 === 106 === In this thesis, one-dimensional Mg-doped ZnO nanorod arrays was made through hydrothermal method, and to be discussed by two sections:
The First section, I will analyze the growth of nanorods which made are through hydrothermal method. We put the sample into room-temperature solution and then heat the solution to 90°C, and we understand that nucleation of ZnO nanorods and its growth must be above specified temperature 70~80℃. When temperature is achieved and stable, growth rate of axial and radial is close to linear relation. Also, The heating process of liquid will increase nanorods growth rate, especially for radial direction. We also observe that thickness of seed layer may participate in growth of nanorods and become part of nanorods at the end.
In the second section, I will analyze the difference of microstructures、optical and electrical performance of ZnO nanorod arrays between different liquid densities, and condition of Mg doping. In order to analyze above characteristic, we also make UV sensor. In order to increase the efficiency of light, and to prevent light being covered by metal electrode, we select ITO as base material and make light through transparent side. In order to form ohmic contact on the interface, we add Al doped ZnO (AZO) films as n+ semiconductors between ZnO nanorod arrays and metal electrode. During experiment, we found Mg doping will affect the thickness of nanorods. Also increase density of Mg doping will decrease bright/dark current while sensitivity of light sensor will also increased. In the end, we wish this research experience will be an important reference for ZnO nanorod arrays production in the future.
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