Calcium tungstate phosphors activated by the Ln3+ ions (Ln=Pr, Nd, Tb, Yb) were synthesized by a traditional high-temperature solid-state method. The crystal structures and morphologies of the products were characterized by scanning electron microscopy (SEM), X-ray powders diffraction (XRD) and infrared spectra (FT-IR). The samples were found to show luminescence properties (down-conversion, DC, at excitation wavelength 254 nm and up-conversion, UC, at excitation wavelength 980 nm). CaWO4 doped with Tb3+/Yb3+showed green DC and UC luminescence characteristic of Tb(III) ion in the range of 470-660 nm, cor-responding to the 5D4→7F6,5,4,3,2 electronic transition. CaWO4 doped with Pr3+/Yb3+showed week blue, green and red (DC and UC) luminescence of Pr(III) ion, in the wavelength region of 450-700 nm. Emission peaks were ascribed to the 3P1→3H4,5,6, 3P0→3H4,5,6, 3P1→3F2 and 3P0→3F2 transitions, respectively. CaWO4 doped with Nd3+/Yb3+phosphor emitted orange UC luminescence at 450-690 nm (2P3/2→4I15/2, 4G7/2→4I9/2,11/2,13/2) and strong near-infrared UC luminescence at 720-900 nm (4F7/2+4S3/2→4I9/2, 4F5/2+2H3/2→4I9/2, 4F3/2→4I9/2) which is the characteristic of Nd(III) ion.
参考文献
| [1] | Li L Z;Yan B;Lin L X;Zhao Y .Solid state synthesis,mi-crostructure and photoluminescence of Eu3+and Tb3+ac-tivated strontium tungstate[J].J Mater Sci:Mater Electron,2011,22:1040. |
| [2] | Auzel F .Upconversion and anti-stokes processes with f and d ions in solids[J].CHEMICAL REVIEWS,2004,104:139. |
| [3] | Palilla F C;Levine A K .YVO4:Eu:a highly efficient,re-demitting phosphor for high pressure mercury lamps[J].Applied Optics,1966,5:1467. |
| [4] | Bailey M P;Rocks B F;Riley C .Terbium chelate for use as a label in fluorescent immunoassays[J].ANALYST,1984,109:1449. |
| [5] | Jüstel T;Nikol H;Ronda C .New development in the field of luminescent materials for lighting and displays[J].ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,1998,37:3084. |
| [6] | Kodaira CA.;Brito HF.;Malta OL.;Serra OA. .Luminescence and energy transfer of the europium (III) tungstate obtained via the Pechini method[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2003(1/2):11-21. |
| [7] | Takahashi M.;Kanno R.;Kawamoto Y.;Kadono K.;Ohtsuki T. Peyghambarian N.;Shojiya M. .NONRADIATIVE DECAY PROCESSES AND MECHANISMS OF FREQUENCY UPCONVERSION OF ER3+ IN ZRF4-BAF2-LAF3 GLASS[J].Journal of Applied Physics,1997(7):2940-2945. |
| [8] | Santos P V Dos;Gouveia E A;De Araujo M T;Gouveia-Neto A S Sombra A S B Medeiros Neto J A .Thermally induced threefold upconversion emission enhancement in nonresonant excited Er3+/Yb3+-codoped chalcogenide glass[J].Applied Physics Letters,1999,74:3607. |
| [9] | Vetrone F;Boyer J C;Capobianco J A;Speghini A Betti-nelli M .980 nm excited upconversion in an Er-doped ZnO-TeO2 glass[J].Applied Physics Letters,2002,80:1752. |
| [10] | Huang YL;Seo HJ;Yang Y;Zhang J .Visible up-conversion luminescence in Er3+-doped PbWO4 single crystals[J].Materials Chemistry and Physics,2005(2/3):424-430. |
| [11] | Han X M;Lin J;Fu J;Xing R B Yu M Zhou Y H Pang M L .Fabrication,patterning and luminescence properties of X2-Y2SiO5:A(A=Eu3+,Tb3+,Ce3+)phosphor films via sol-gel soft lithography[J].Solid State Sciences,2004,6:349. |
| [12] | Scheps R .Upconversion laser processes[J].Progress in Quantum Electronics,1996,20:271. |
| [13] | Lim SF;Riehn R;Ryu WS;Khanarian N;Tung CK;Tank D;Austin RH .In vivo and scanning electron microscopy imaging of upconverting nanophosphors in Caenorhabditis elegans[J].Nano letters,2006(2):169-174. |
| [14] | Maciel GS.;Messaddeq Y.;Aegerter MA.;Dearaujo CB. .FREQUENCY UPCONVERSION IN ER3+-DOPED FLUOROINDATE-GLASSES PUMPED AT 1.48 MU-M[J].Physical Review.B.Condensed Matter,1997(10):6335-6342. |
| [15] | Downing E;Hesselink L;Ralston J;Macfarlane R .A three color,solid-state,three-dimensional display[J].SCIENCE,1996,273:1185. |
| [16] | Sun J Y;Xian J B;Zhang X Y;Du H Y .Hydrothermal synthesis of SrF2:Yb3+/Er3+micro-/nanocrystals with mul-tiform morphologies and upconversion properties[J].Journal of Rare Earths,2011,29:32. |
| [17] | Rico M.;Zaldo C.;Volkov V. .Photoluminescence and up-conversion of Er3+ in tetragonal NaBi(XO4)(2), X=Mo or W, scheelites[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2001(0):806-810. |
| [18] | Zhou Y;Yan B .RE2(MO4)3:Ln3+(RE=Y,La,Gd,Lu;M=W,Mo;Ln=Eu,Sm,Dy)microcrystals:Controlled syn-thesis,microstructure and tunable luminescence[J].Cryst EngComm,2013,15:5694. |
| [19] | Du, C.;Lang, F.;Su, Y.;Liu, Z..Low temperature nanocasting synthesis of lanthanide ions (Ln = Tb, Eu, Dy) doped CaWO_4 mesoporous structure with efficiently luminescent properties[J].Journal of Colloid and Interface Science,2013:94-99. |
| [20] | Khanna A;Dutta P S .CaWO4:Eu3+,Dy3+,Tb3+phosphor crystals for solid-state lighting applications[J].ECS Transac-tions,2012,41:39. |
| [21] | Zhang W T;Long J P;Fan A D;Li J F .Effect of replace-ment of Ca by Ln(Ln=Y,Gd)on the structural and lumi-nescence properties of CaWO4:Eu3+ red phosphors pre-pared via co-precipitation[J].Materials Research Bulletin,2012,47:3479. |
| [22] | Grobelna B;Lipowska B;K?onkowski A M .Energy trans-fer in calcium tungstate doped with Eu(III)or Tb(III)ions incorporated into silica xerogel[J].Journal of Alloys and Compounds,2006,419:191. |
| [23] | Xu, W.;Zhao, H.;Li, Y.;Zheng, L.;Zhang, Z.;Cao, W..Optical temperature sensing through the upconversion luminescence from Ho~(3+)/Yb~(3+) codoped CaWO4[J].Sensors and Actuators, B. Chemical,2013:1096-1100. |
| [24] | Wei Xu;Xiaoyang Gao;Longjiang Zheng;Peng Wang;Zhiguo Zhang;Wenwu Cao .Optical Thermometry through Green Upconversion Emissions in Er~(3)/Yb~(3)-Codoped CaWO_4 Phosphor[J].Applied physics express,2012(7):72201.1-72201.3. |
| [25] | Wang, ZF;Wang, YH;Li, YZ;Zhang, HJ .Near-infrared quantum cutting in Tb(3+), Yb(3+) co-doped calcium tungstate via second-order downconversion[J].Journal of Materials Research,2011(5):693-696. |
| [26] | Sun J Y;Sun Y N;Cao C;Xia Z G,Du H Y .Near-infrared luminescence and quantum cutting mechanism in CaWO4:Nd3+,Yb3+[J].Appl Phys B,2013,111:367. |
| [27] | Pisku?a Z;Staninski K;Lis S .Luminescence properties of Tm3+/Yb3+,Er3+/Yb3+ and Ho3+/Yb3+ activated calcium tungstate[J].Journal of Rare Earths,2011,29:1166. |
| [28] | Teleb S M;Refat M S .Synthesis and characterization of lanthanide carbonates obtained during the reaction of urea with lanthanide(III)salts at high temperature[J].Bull Chem Techno Macedonia,2006,25:57. |
| [29] | Nakamoto K.Infrared and Raman Spectra of Inorganic and Coordination Compounds,6th edn[M].New Jersey:Wiley,2009 |
| [30] | Porto S P S;Scott J F .Raman Spectra of CaWO4,SrWO4,CaMoO4,and SrMoO4[J].Physical Review,1967,157:716. |
| [31] | Hazen R M;Finger L W;Mariathasan J W E .High-pres-sure crystal chemistry of scheelite-type tungstates and molybdates Note:P=0.0001 GPa,in air[J].Journal of Physics and Chemistry of Solids,1985,46:253. |
| [32] | Verma R K;Rai D K;Rai S B .Investigation of structural properties and its effect on optical properties:Yb3+/Tb3+codoped in aluminum silicate glass[J].Journal of Alloys and Compounds,2011,509:5591. |
| [33] | Prorok, K.;Gnach, A.;Bednarkiewicz, A.;Str?k, W..Energy up-conversion in Tb~(3+)/Yb~(3+) co-doped colloidal α-NaYF4 nanocrystals[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2013:103-109. |
| [34] | Luo L;Lai WPW;Wong KL;Wong WT;Li KF;Cheah KW .Green upconversion fluorescence in terbium coordination complexes[J].Chemical Physics Letters,2004(4-6):372-376. |
| [35] | Gouveia-Neto A S;Da Costa E B;Bueno L A;Ribeiro S J L .Red,green,and blue upconversion luminescence in yt-terbium-sensitized praseodymium-doped lead-cadmium-germanate glass[J].Optical Materials,2004,26:271. |
| [36] | Balda R.;Fernandez J.;Mendioroz A.;Voda M.;Al-Saleh M. .Infrared-to-visible upconversion processes in Pr3+/Yb3+-codoped KPb2Cl5 - art. no. 165101[J].Physical review, B. Condensed matter and materials physics,2003(16):5101-0. |
| [37] | Oprea II;Hesse H;Betzler K .Infrared-to-visible upconversion luminescence in neodymium-doped bismuth-borate glass[J].Physica status solidi, B. Basic research,2005(12):R109-R111. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%