摘要
采用溶胶-凝胶法在Si(100)衬底上生长了K与N共掺的ZnO薄膜,并用X射线衍射仪、扫描电子显微镜、荧光分光光度计、紫外-可见分光光度计对ZnO薄膜样品的结构和光学特性进行了研究。结果表明,溶胶-凝胶法制备的ZnO薄膜为六方纤锌矿结构。随着K掺杂浓度的增大,薄膜的结晶性变好,组成薄膜的颗粒变大,并表现出c轴择优生长特性,同时掺杂导致的氧空位缺陷也在增加,使得绿光发射增强,薄膜的光学带隙先增后减。
The K-N co-doped ZnO films were prepared on Si（100）substrates by sol-gel method.The structure and the optical properties of the ZnO films were investigated by X-ray diffraction,scanning electron microsco-py,photoluminescence and ultraviolet and visible spectrophotometer.The results show that the films exhibit a hexagonal structure.As the concentration of potassium increases,the crystallinity of the films was improved and the grain size increases,showing a preferential growth along c axis.Meanwhile,the increased concentration of K-N doping results in increased oxygen vacancies,enhanced green photoluminescence,and the optical band-gap that increases first and then decreases.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第22期3301-3304,共4页
Journal of Functional Materials
基金
甘肃省自然科学基金资助项目(1107RJYA280
1208RJYA021)
