ZnWO_4单晶衬底制备ZnO薄膜的发光性能

Research on Fluorescence of ZnO Film on ZnWO_4 Crystal Substrates

以Zn(CH_3COO)_2·2H_2O为反应的前驱体,采用溶胶一凝胶法在ZnWO_4单晶衬底上制备出了具有良好光学特性的ZnO薄膜．通过理论计算和实验论证分析了ZnWO_4单晶作为制备ZnO薄膜的衬底材料的可行性．结果表明,ZnWO_4晶体的a晶面与ZnO晶体的c晶面晶格匹配很好,最佳方位晶格失配率只有0．83％,是制备ZnO薄膜的优良衬底．用波长325 nm光激发,薄膜在396 nm有较强的荧光发射．

ZnO thin films of high optical quality are prepared on single crystal substrates by sol-gel technique, and zinc acetate is used as precursor in this process. The feasibility of ZnWO4 crystal used as a substrate material was analyzed and proved by theory and experiment. The results of experiment show that lattice between ZnWO4 a-plane and ZnO c-plane closely matches, while the mismatch of the optimum orientation lattice is only 0.83%, and the ZnWO4 crystal wafers can be used as a fine substrate material for forming ZnO film. The strong fluorescence of the thin film is observed at 396 nm when it is excited by 325 nm wavelength light.