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《Journal of Synthetic Crystals》 2013-01
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Effect of Li Doping on the Structure and Optical Properties of ZnO Thin Films

LIU Ya-li,RUAN Yong-feng,ZHAI Ying,ZHANG Ling-cui,QIU Chun-xia(School of Science,Tianjin University,Tianjin 300072,China)  
ZnO thin films with different Li doping concentrations were successfully prepared on ITO conducting glass substrates by sol-gel method.The effects of Li doping concentrations on the structure,surface morphology,lattice parameter,optical band gap and photoluminescence of ZnO thin films were analyzed by XRD,SEM,UV-VIS-NIR spectrometer and fluorescence spectrophotometer,respectively.The results show that the lattice parameters become smaller after doping,and the optical band gap tends to be narrow simultaneously.Photoluminescence spectra display that the broad visible emission peaks consist of green emission and yellow emission and exhibit red shift with the increase of Lithium concentration.It is considered that the yellow emission is presumably attributed to electron transition from single ionized oxygen vacancy V+O to associated defect LiZnVO,and the configuration model of associated defect LiZnVO is also suggested.
【CateGory Index】: O484.41
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【Citations】
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