A series of red-emitting Ca2-xAl2SiO7:xEu3+ (x =1 mol.％-10 mol.％) phosphors were synthesized by the sol-gel method.The effects of annealing temperature and doping concentration on the crystal structure and luminescence properties of Ca2Al2SiOT:Eu3+ phosphors were investigated.X-ray diffraction (XRD) profiles showed that all peaks could be attributed to the tetragonal Ca2Al2SiO7 phase when the sample was annealed at 1000℃.Scanning electron microscopy (SEM) micrographs indicate that the phosphors have an irregularly rounded morphology with particles of about 200 nm.Excitation spectra showed that the strong broad band at around 258 nm and weak sharp lines in 350-490 nm were attributed to the charge transfer band of Eu3+-O2- and f-f transitions within the 4f6 configurafion of Eu3+ ions,respectively.Emission spectra implied that the red luminescence could be attributed to the transitions from the 51D0 excited level to the 7FJ (J =0,1,2,3,4)levels of Eu3+ ions with the main electric dipole transition 5D0→7F2 (618 and 620 nm),and Eu3+ ions prefer to occupy a lower symmetry site in the crystal lattice.Moreover,the photoluminescence (PL) intensity was strongly dependent on both the sintering temperature and doping concentration,and the highest PL intensity was observed at an Eu3+ concentration x =7 tmol.％ after annealing at 1100℃.The obtained Ca2Al2SiOT:Eu3+ phosphor may have potential application for the red lamp phosphor.
参考文献
| [1] | 李勇,游宝贵,赵伟,张慰萍,尹民.稀土离子掺杂的焦硅酸钇纳米粉末的制备和发光和发光性质[J].化学物理学报,2008(04):376-380. |
| [2] | Omkaram I;Vengala Rao B;Buddhudu S .Photoluminescence properties of Eu3+:MgAl2O4 powder phosphor[J].Journal of Alloys and Compounds,2009,474(1-2):565. |
| [3] | Natarajan V;Murthy KVR;Kumar MLJ .Photoluminescence investigations of Zn2SiO4 co-doped with Eu3+ and Tb3+ ions[J].Solid State Communications,2005(4):261-264. |
| [4] | Kuo, TW;Chen, TM .Synthesis and luminescence properties of Eu3+, Ce3+ and Tb3+-activated Sr3La2(BO3)(4) under UV excitation[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2010(3):483-487. |
| [5] | Kim JS;Kwon AK;Kim JS;Park HL;Kim GC;do Han S .Optical and structural properties of ZnGa2O4 : Eu3+ nanophosphor by hydrothermal method[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2007(0):851-854. |
| [6] | Dhanaraj J;Jagannathan R;Kutty T R N;Lu C H .Photoluminescence characteristics of Y2O3:Eu3+ nanophosphors prepared using sol-gel thermolysis[J].Journal of Physical Chemistry B,2001,105(45):11098. |
| [7] | Le Boulanger P.;Girard S.;Margerie J.;Moncorge R.;Viana B.;Doualan JL. .Excited-state absorption of Er3+ in the Ca2Al2SiO7 laser crystal[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2000(1):15-21. |
| [8] | Simondi-Teisseire B;Viana B;Vivien D;Lejus A M .Yb3+ to Er3+ energy transfer and rate equations formalism in the eye safe laser material Yb:Er:Ca2Al2SiO7[J].Optical Materials,1996,6(04):267. |
| [9] | Viana B;Lejus A M;Saber D;Duxin N,and Vivien D .Optical properties and energy transfer among Nd3+ in Nd:Ca2Al2SiO7 crystals for diode pumped lasers[J].Optical Materials,1994,3(04):307. |
| [10] | Haiyan Jiao;Yuhua Wang .Ca_2Al_2SiO_7:Ce~(3+), Tb~(3+): A White-Light Phosphor Suitable for White-Light-Emitting Diodes[J].Journal of the Electrochemical Society,2009(5):J117-J120. |
| [11] | Q. ZHANG;J. WANG;M. ZHANG;W. DING;Q. SU .Enhanced photoluminescence of Ca_2Al_2SiO_7:Eu~(3+) by charge compensation method[J].Applied physics, A. Materials science & processing,2007(4):805-809. |
| [12] | Zhang Q;Wang J;Zhang M;Su Q .Tunable bluish green to yellowish green Ca2(1-x)Sr2xAl2SiO7 : Eu2+ phosphors for potential LED application[J].Applied physics, B. Lasers and optics,2008(2):195-198. |
| [13] | Intense red phosphors for near-ultraviolet light-emitting diodes[J].Applied physics, B. Lasers and optics,2010(2/3):423. |
| [14] | Kodama N.;Yamaga M.;Tanii Y. .Optical properties of long-lasting phosphorescent crystals Ce3+-doped Ca2Al2SiO7 and CaYAl3O7[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2000(0):1076-1078. |
| [15] | Kodama N;Sasaki N;Yamaga M;Masui Y .Long-lasting phosphorescence of Eu2+ in melilite[J].Journal of Luminescence,2001,94-95:19. |
| [16] | Ito Y;Komeno A;Uematsu K;Toda K,and Sato M .Luminescence properties of long-persistence silicate phosphors[J].Journal of Alloys and Compounds,2006,408-412:907. |
| [17] | X.H. Chuai;H.J. Zhang;F.Sh. Li;K.Ch. Chou .The luminescence of Eu~(3+) ion in Ca_2Al_2SiO_7[J].Optical materials,2004(3):301-305. |
| [18] | Wang XJ.;Jia DD.;Yen WM. .Mn2+ activated green, yellow, and red long persistent phosphors[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2003(0):34-37. |
| [19] | Fujita S;Suzuki K;Shibasaki Y;Mori T .Synthesis of hydrogarnet from molten slag and its hydrogen chloride fixation performance at high temperature[J].Journal of Material Cycles and Waste Management,2002,4:70. |
| [20] | YANG Liangzhun,FANG Min,Liu Yuejiao,LIU Chao,WANG Xiuying,YU Xibin.Preparation and properties of luminous materials of CaSiO3:Pb, Mn by sol-gel method[J].中国高等学校学术文摘·化学,2007(04):442-446. |
| [21] | Yin, Y.;Xu, W.J.;Wei, F.;Ran, G.Z.;Qin, G.G.;Shi, Y.F.;Yao, Q.G.;Yao, S.D. .Room temperature Er~(3+) 1.54μm electroluminescence from Si-rich erbium silicate deposited by magnetron sputtering[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2010(33):335102-1-335102-5. |
| [22] | YEE-SHIN CHANG .The Effects of Heat Treatment on the Crystallinity and Luminescence Properties of YInGe_(2)O_(7) Doped with Eu~(3+) Ions[J].Journal of Electronic Materials,2008(7):1024-1028. |
| [23] | Dexter D L;Schulman J H .Theory of concentration quenching in inorganic phosphors[J].Journal of Chemical Physics,1954,22:1063. |
| [24] | LI Guanghuan,LONG Tao,SONG Yanhua,GAO Guimei,XU Jijing,AN Baichao,GAN Shucai,HONG Guangyan.Preparation and luminescent properties of CaAl_2O_4:Eu~(3+),R~+(R=Li,Na,K) phosphors[J].稀土学报（英文版）,2010(01):22-25. |
| [25] | KANG Ming,LIU Jun,YIN Guangfu,SUN Rong.Preparation and characterization of Eu3+-doped CaCO3 phosphor by micro-wave synthesis[J].稀有金属（英文版）,2009(05):439-444. |
| [26] | 蔡进军,王忆,潘欢欢,曾庆光,胡社军.溶胶-凝胶法制备绿色发光粉Zn_2SiO_4：Mn~（2+）及其发光性能[J].发光学报,2010(01):75-78. |
| [27] | WANG Yi,ZENG Qingguang,HU Shejun,WU Kunbin,JIANG Junhong,CHEN Genting.Concentration and annealing effect on PL properties of sol-gel derived SiO2-Y2O3:Eu3+ nanocomposites[J].稀土学报（英文版）,2010(02):176-180. |
| [28] | Thim G P;Brito H F;Silva S A;Oliveira M A S,and Felinto M C F C .Preparation and optical properties of tfivalent europium doped into cordierite using the sol-gel process[J].Journal of Solid State Chemistry,2003,171(1-2):375. |
| [29] | Jia G;Song Y H;Yang M;Huang YJ,Zhang L H,and You H P .Uniform YVO4:Ln3+ (Ln =Eu,Dy,and Sm)nanocrystals:Solvothermal synthesis and luminescence properties[J].Optical Materials,2009,31(06):1032. |
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