Different rare earth (RE) ions dopants were added into the SrAl2SiO7:Eu2+ phosphors in order to enhance the phospho-rescence properties, and the effect of the RE ions including Yb3+, Ce3+, Nd3+, Dy3+ and Tm3+, was comparatively investigated. It was found that Nd3+ addition improved the phosphorescence properties obviously among all the studied RE ions. Therefore, Sr1.96–xAl2SiO7:xEu2+,yNd3+phosphors were studied in detail, and the optimum Eu2+ and Nd3+ concentrations were determined with the afterglow time of about 20 min. The phase structures, photoluminescence (PL) properties, long-lasting phosphorescence (LLP) properties, afterglow decay curves and thermo-luminescence (TL) for the selected phosphors during the corresponding study were investigated. All the phosphors exhibited green PL emission and LLP emission. There were two TL bands located at about 325 and 380 K for the studied samples, and the relationship between RE addition and phosphorescence properties was dis-cussed.
参考文献
| [1] | Li Y Q;Delsing A C;De With G;Hintzen H T .Lumines-cence properties of Eu2+-activated alkaline-earth silicon oxynitride MSi2O2-δN2+2/3δ(M=Ca,Sr,Ba):a promising class of novel LED conversion phosphors[J].CHEMISTRY OF MATERIALS,2005,17:3242. |
| [2] | 刘冯新,房永征,张娜,候京山,张灵彦,于圣洁,刘淑培.Eu2+ and Dy3+ codoped (Ca,Sr)7(SiO3)6Cl2 highly efficient yellow phosphor[J].稀土学报（英文版）,2014(09):812-816. |
| [3] | Liu, YL;Lei, BF;Shi, CS .Luminescent properties of a white afterglow phosphor CdSiO3 : Dy3+[J].Chemistry of Materials,2005(8):2108-2113. |
| [4] | Clabau, F;Rocquefelte, X;Jobic, S;Deniard, P;Whangbo, MH;Garcia, A;Le Mercier, T .Mechanism of phosphorescence appropriate for the long-lasting phosphors Eu2+-doped SrAl2O4 with codopants Dy3+ and B3+[J].Chemistry of Materials,2005(15):3904-3912. |
| [5] | Wako A H;Dejene B F;Swart H C .Properties of blue emitting CaAl2O4:Eu2+,Dy3+ phosphor by optimizing the amount of flux and fuel[J].PHYSICA B,2014,439:160. |
| [6] | Wu, H.;Hu, Y.;Ju, G.;Chen, L.;Wang, X.;Yang, Z. .Photoluminescence and thermoluminescence of Ce~3 and Eu ~2 in Ca_2Al_2SiO_7 matrix[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2011(12):2441-2445. |
| [7] | Li G H;Li M M;Li L L;Zou H F Zou L C Gan S C Xu X C .Luminescent properties of Sr2Al2SiO7:Ce3+,Eu2+ phosphors for near UV-excited white light-emitting diodes[J].Materials Letters,2011,65:3418. |
| [8] | Ding YL;Zhang YX;Wang ZY;Li W;Mao DL;Han HB;Chang CK .Photoluminescence of Eu single doped and Eu/Dy codoped Sr2Al2SiO7 phosphors with long persistence[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2009(3):294-299. |
| [9] | 王育华,朱革,辛双宇,王倩,李艳艳,吴泉生,王闯,王希成,丁鑫,耿婉莹.Recent development in rare earth doped phosphors for white light emitting diodes[J].稀土学报（英文版）,2015(1):1-12. |
| [10] | Chen X;Xia Z G;Liu Q L .Synthesis,structure and lumi-nescence properties of new chloro-germanate phosphors Ca3GeO4Cl2:Eu2+[J].DALTON TRANSACTIONS,2014,43:13370. |
| [11] | Lu F C;Bai L J;Dang W;Yang Z P, Lin P .Structure and photoluminescence of Eu2+ doped Sr2Al2SiO7cyan-green emitting phosphors[J].ECS J Solid State Sci Technol,2015,4:R27. |
| [12] | Li G H;Li M M;Li L L;Yu H Zou H F Zou L C Gan S C Xu X C .Luminescent properties of Sr2Al2SiO7:Ce3+,Eu2+ phosphors for near UV-excited white light-emitting diodes[J].Materials Letters,2011,65:3418. |
| [13] | Aitasalo T;H?ls;Junger H;Lastusaari M, Niittykoski .Thermoluminescence study of persistent luminescence materials:Eu2+and R3+ doped calcium aluminates. CaAl2O4:Eu2+,R3+[J].Journal of Physical Chemistry B,2006,110:4589. |
| [14] | Li Y;Li B H;Ni C C;Yuan S X Wang J Tang Q Su Q .Synthesis,persistent luminescence,and thermolumines-cence properties of yellow Sr3SiO5:Eu2+,RE3+(RE=Ce,Nd,Dy,Ho,Er,Tm,Yb)and orange-red Sr3-xBaxSiO5:Eu2+,Dy3+ phosphor[J].Chem Asian J,2014,9:494. |
| [15] | Luo Y;Xia Z G .Effect of Al/Ga substitution on photolu-minescence and phosphorescence properties of garnet-type Y3Sc2Ga3-xAlxO12:Ce3+ phosphor[J].J Phys Chem C,2014,118:23297. |
| [16] | Qin J L;Lei B F;Li J F;Liu Y L, Zhang H R, Zheng M T,Xiao Y,Chao K F .Temperature-dependent long-lasting phosphorescence in SrSi2O2N2:Eu2+.ESC[J].J Solid State Sci Technol,2013,2:R60. |
| [17] | Katsumata T;Toyomane S;Sakai R;Komuro S;Morikawa T .Trap levels in Eu-doped SrAl2O4 phosphor crystals co-doped with rare-earth elements[J].Journal of the American Ceramic Society,2006(3):932-936. |
| [18] | 邓耀敏,易双萍,黄军,赵韦人,方夏冰.A novel long lasting phosphor Sr5 (PO4)3FxCl1-x:Eu2+,Gd3+prepared in air condition[J].稀土学报（英文版）,2013(10):962-968. |
| [19] | Chen R .On the calculation of activation energies and fre-quency factors from glow curves[J].Journal of Applied Physics,1969,40:570. |
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