溶胶－凝胶法制备的(Mg,Al)共掺ZnO粉体的结构与光学性能

In this paper, structural and optical properties of 1 at % Al-doped Zn1-xMgxO (x=0-8 at.%) powders prepared by sol-gel method were systematically investigated by means of X-ray diffraction, scanning electron microscopy, ultraviolet-visible absorbance measurement, photoluminescence and Raman scattering spectra. All the powders retained the hexagonal wurtzite structure of ZnO. The band gap and near band emission energies determined form absorbance and photoluminescence spectra both increased linearly with increasing Mg content, which implied that the Mg worked effectively on band gap engineering, irrespective of Al codoping. However, according to the Raman scattering studies, for the sample of x=8%, the Al doping efficiency might be affected by higher Mg codoping.