【摘要】 采用浮区法(FZ)在高氧压条件下生长出大尺寸的ZnO单晶晶须.X射线衍射(XRD)和拉曼光谱(Raman)分析结果表明,生长的ZnO单晶晶须为六方结构晶体,沿(100)晶面方向有明显的择优生长取向.研究了0.3 MPa氧压下生长的ZnO晶须的变功率光致发光光谱,结果表明,晶须在室温下有比较高的紫外光致发光效率和较低的缺陷,其紫外发光激发强度的阈值>1 kW/cm2.更多还原

【Abstract】 ZnO(wurtzite) whiskers were grown with a floating zone method using ZnO powder as starting materials under 0.3 MPa oxygen pressures.The as-grown samples were characterized by X-ray diffraction and Raman scattering,and their characteristic peaks verify that the as-grown ZnO whiskers have excellent hexagonal wurtzite phase and(100) orientation.The photoluminescence properties of the as-grown ZnO whiskers were measured under 266 nm-light excitation from a Nd∶YAG laser,and the influence of various laser intensity on the photoluminescence of the ZnO whiskers was investigated.It was found that the threshold of UV was higher than 1 kW/cm2.更多还原