摘要
Ag-doped ZnO (ZnO:Ag) films are prepared on c-plane sapphire substrates by pulsed laser deposition at different substrate temperatures.The effect of substrate temperature on the ZnO:Ag film is studied in detail by EDX,XRD and Raman spectroscopy.The results reveal that raising the substrate temperature is beneficial for incorporating Ag into ZnO:Ag films in the range of our experimental temperatures and a number of Ag atoms incorporation into ZnO:Ag films may cause the (002) peak positions of the XRD spectra shift to a lower angle direction,but hardly affect the c-axis orientation of the films.The (002) peak shift ought to be due to the increase of lattice constant in the c-axis direction caused by the partial substitution of Zn^(2+) ions by Ag^(+) ions.In addition,a local vibrational mode (LVM) at 492cm^(-1) induced by doping Ag occurred in the Raman spectra of ali the ZnO:Ag films and its peak position hardly shifted with increasing substrate temperature.It means that the LVM can act as an indication of Ag incorporation into ZnO:Ag film.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 60777009,50532080,and 10804014
the Key Laboratory Projects of the Education Department of Liaoning Province(No 20060131)
the Doctoral Project of the Ministry of Education of China under Grant Nos 20070141038 and 20070141017.
