ZnO纳米片薄膜的合成、表征及其光学性质

采用水热法在修饰有ZnO种子层的石英玻璃衬底上制备出ZnO纳米片薄膜。利用场发射扫描电子显微镜、X射线衍射仪、透射电镜和荧光光谱仪对样品的形貌、结构和光致发光性质进行表征和分析,探讨了其形成机理。结果表明,制备的ZnO纳米片为六方纤锌矿型单晶结构,具有沿<101ˉ0>方向的择优取向,其室温下的光致发光谱由尖锐的紫外发光峰(380 nm处)和较宽的可见发光带组成,其中可见光发射可以拟合为中心分别位于550、620和760 nm处的3个发光峰。

Synthesis, Characterization and Optical Properties of ZnO Nanosheet Films

ZnO nanosheet films were synthesized on quartz glass substrates with ZnO seed-lay ers with a hydrothermal method.Their morphologies,structures,and optical properties were investi gated with scanning electron microscope,X-ray diffractometer,transmission electron microscope and photoluminescence spectrometer,the possible growth mechanism was explored.The results show that these ZnO nanosheets are single crystalline with hexagonal wurtzite structure,they prefer entially grow along the <101ˉ0 > directions.The room-temperature photoluminescence spectrum are composed of a sharp ultraviolet emission peak(380 nm)and a wide visible emission band.The visi ble emission band can be divided into three emission peaks centered around 550,620 and 760 nm,respectively.