Seo D J,Kang Y C,Park S B.The synthesis of (Y1-xGdx)2O3:Eu phosphor particles by flame spray pyrolysis with LiCl flux[J].Appl.Phys.A,2003,77(5):659-663.[2] Sun Baojuan,Song Hongwei,Lu Shaozhe,et al.Effect of co-doping to structural and luminescent properties of nanocrystalline Y2O3:Eu3+[J].Chin.J.Lumin.(发光学报),2004,25(6):715-719 (in Chinese).[3] Sun X D,Xiang X D.New phosphor (Gd2-xZnx)O3-δ:Eu3+ with high luminescent efficiency and superior chromaticity[J].Appl.Phys.Lett.,1998,72(14):525-527.[4] Park J C,Moon H K,Kim D K,et al.Morphology and cathodoluminescence of Li-doped Gd2O3:Eu3+,a red phosphor operating at low voltages[J].Appl.Phys.Lett.,2000,77(14):2162-2164.[5] Park J K,Park S M,Kim C H,et al.Synthesis of Gd2O3:Eu,Li phosphor by modified combinatorial chemistry and its photoluminescence behavior[J].J.Electrochem.Soc.,2003,150(1):H27-H31.[6] Chi L S,Liu R S,Lee B J.Synthesis of Y2O3:Eu,Bi red phosphors by homogeneous coprecipitation and their photoluminescence behaviors[J].J.Electrochem.Soc.,2005,152(8):J93-J98.[7] Liu X L,Liu B J,Gu M,et al.Highly enhanced photoluminescence and X-ray excited luminescence of Li doped Gd2O3:Eu3+ thin films[J].Solid State Commun.,2006,137(3):162-165.[8] Gschneidner K A,Eyring L.Handbook on the Physics and Chemistry of Rare Earth[M].North-Holland Publishing Company,1979.[9] Jollet F,Noguera C,Thromat N,et al.Electronic structure of yttrium oxide[J].Phys.Rev.B,1990,42(12):7587-7595.[10] Te Velde G,Bickelhaupt F M,Baerends E J,et al.Chemistry with ADF[J].J.Comput.Chem.,2001,22(9):931-967.[11] Zheng J X,Ceder G,Maxisch T,et al.Native point defects in yttria and relevance to its use as a high-dielectric-constant gate oxide material:First-principles study[J].Phys.Rev.B,2006,73(10):104101-1-7.[12] Zhang Rui,Gu Mu,Liu X L,et al.Theoretical study of the effect of Li+ doping on the luminescence of Y2O3:Eu3+ phosphors[J].Acta Physica Sinica (物理学报),Accepted (in Chinese).[13] Yeh S M,Su C S.Mixing LiF in Gd2O3:Eu to enhance ultraviolet radiation induced thermoluminescent sensitivity after sintering process[J].Mater.Sci.Eng.B,1996,38:245-249.