摘要
应用水热方法,合成了直径约30nm的ZnO纳米棒并通过X射线衍射、透射电子显微镜和拉曼光谱对其结构进行表征.还研究了他们的光学性质,如:室温下的光致发光谱以及温度依赖的光致发光光谱.研究结果显示,反应溶液的pH值修饰了ZnO纳米棒的长径比.观测到了ZnO纳米棒中源自激子的紫外发光(3.2eV)和来自于深能级缺陷的可见发光(2.0eV).根据变温发射光谱,通过对实验数据的拟合获得了一些重要的参数,如:激子的爱因斯坦温度及深能级的热激活能等.
ZnO nanorods are synthsized by the hydrythermal method,with the diameter of about 30 nm,and their structures are characterized by the X-ray diffraction,the transmission electron microscopy and the Raman spectra. Their optical properties are also studied,such as photoluminescent spectra and temperature dependence photoluminescent spectra. It indicates that the pH value of the solution affected the aspect ratio of the obtained ZnO rods. Both the ultraviolet emission （3.2 eV） originated in the excitons and the visible ones from the deep level defects （2.0 eV） are observed. According to temperature-dependent luminescence,some important parameters are obtained and compared,such as the Einstein temperature for the excitons,the thermal activation energy of excitons or deep level defects,etc.
出处
《河南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第1期96-99,共4页
Journal of Henan Normal University(Natural Science Edition)
基金
河南省科技厅基础与科技前沿研究项目(092300410165)
关键词
ZNO纳米棒
水热合成
结构和光学性质
ZnO nanorods hydrythermal synthesis structure and optical properties
