Abstract

The compounds containing lutetium and tungsten atoms have large effective atomic number (Zeff) and high stopping ability for high energy radiation because both lutetium and tungsten atoms are heavy with large atomic number. In order to obtain a new red-emitting phosphor with high efficiency for X-ray detection, the trivalent europium ion (Eu3+) activated alkaline double tungstate phosphor NaLu(WO4)2:Eu3+ was prepared by high temperature solid state reaction. The crystalline structures of synthesized phosphor were determined by powder X-ray diffraction (XRD) and elucidated using Topas Academic software, and the morphologies were characterized by thermal field emission scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDS). The Rietveld structural refinement results suggest that the cell parameters become larger with the increasing of Eu3+ doping concentration. The emission spectra of NaLu(WO4)2:Eu3+ under UV and X-ray radiation were measured, respectively. It was observed that this micro-particle phosphor shows intensive red emission under X-ray radiation, which implies that NaLu(WO4)2:Eu3+ phosphor has potential application for X-ray detection.

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    [CrossRef]
  5. S. W. Kim, K. Jyoko, T. Masui, and N. Imanaka, “Synthesis of green-emitting (La,Gd)OBr:Tb3+ phosphors,” Materials3(4), 2506–2515 (2010).
    [CrossRef]
  6. J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
    [CrossRef]
  7. E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
    [CrossRef]
  8. B. Li, Z. N. Gu, J. H. Lin, and M. Z. Su, “X-ray luminescence properties of rare-earth doped orthotantalate,” Mater. Res. Bull.35(12), 1921–1931 (2000).
    [CrossRef]
  9. Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
    [CrossRef]
  10. J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
    [CrossRef]
  11. M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
    [CrossRef]
  12. D. Kasprowicz, M. G. Brik, A. Majchrowski, E. Michalski, and E. Mykowska, “Spectroscopic studies of Nd3+ and Er3+ in KGd(WO4)2 single crystals,” J. Lumin.130(4), 623–630 (2010).
    [CrossRef]
  13. M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
    [CrossRef]
  14. R. D. Shannon, “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystallogr. A32(5), 751–767 (1976).
    [CrossRef]
  15. C. A. Kodaira, H. F. Brito, O. L. Malta, and O. A. Serra, “Luminescence and energy transfer of the europium (III) tungstate obtained via the Pechini method,” J. Lumin.101(1-2), 11–21 (2003).
    [CrossRef]
  16. F. Wang, X. P. Fan, D. B. Pi, Z. Y. Wang, and M. Q. Wang, “Hydrothermal synthesis and luminescence behavior of rare-earth-doped NaLa(WO4)2 powders,” J. Solid State Chem.178(3), 825–830 (2005).
    [CrossRef]
  17. Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
    [CrossRef]
  18. S. Neeraj, N. Kijima, and A. K. Cheetham, “Novel red phosphors for solid-state lighting: the system NaM(WO4)2-x(MoO4)x:Eu3+ (M=Gd, Y, Bi),” Chem. Phys. Lett.387(1-3), 2–6 (2004).
    [CrossRef]
  19. C. H. Chiu, M. F. Wang, C. S. Lee, and T. M. Chen, “Structural, spectroscopic and photoluminescence studies of LiEu(WO4)2-x(MoO4)x as a near-UV convertible phosphor,” J. Solid State Chem.180(2), 619–627 (2007).
    [CrossRef]
  20. X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
    [CrossRef]
  21. S. K. Shi, X. R. Liu, J. Gao, and J. Zhou, “Spectroscopic properties and intense red-light emission of (Ca, Eu, M)WO4 (M=Mg, Zn, Li),” Spectrochim. Acta, Part A69(2), 396–399 (2008).
    [CrossRef]

2012 (1)

T. Woo and T. Kim, “Light collection enhancement of the digital x-ray detector using Gd2O2S:Tb and CsI:Tl phosphors in the aspect of nano-scale light dispersions,” Radiat. Phys. Chem.81(1), 12–15 (2012).
[CrossRef]

2011 (4)

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
[CrossRef]

2010 (5)

M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
[CrossRef]

D. Kasprowicz, M. G. Brik, A. Majchrowski, E. Michalski, and E. Mykowska, “Spectroscopic studies of Nd3+ and Er3+ in KGd(WO4)2 single crystals,” J. Lumin.130(4), 623–630 (2010).
[CrossRef]

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

S. W. Kim, K. Jyoko, T. Masui, and N. Imanaka, “Synthesis of green-emitting (La,Gd)OBr:Tb3+ phosphors,” Materials3(4), 2506–2515 (2010).
[CrossRef]

P. G. Jung, C. H. Lee, K. M. Bae, J. M. Lee, S. M. Lee, C. H. Lim, S. Yun, H. K. Kim, and J. S. Ko, “Microdome-gooved Gd2O2S:Tb scintillator for flexible and high resolution digital radiography,” Opt. Express18(14), 14850–14858 (2010).
[CrossRef]

2009 (1)

Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
[CrossRef]

2008 (1)

S. K. Shi, X. R. Liu, J. Gao, and J. Zhou, “Spectroscopic properties and intense red-light emission of (Ca, Eu, M)WO4 (M=Mg, Zn, Li),” Spectrochim. Acta, Part A69(2), 396–399 (2008).
[CrossRef]

2007 (1)

C. H. Chiu, M. F. Wang, C. S. Lee, and T. M. Chen, “Structural, spectroscopic and photoluminescence studies of LiEu(WO4)2-x(MoO4)x as a near-UV convertible phosphor,” J. Solid State Chem.180(2), 619–627 (2007).
[CrossRef]

2005 (1)

F. Wang, X. P. Fan, D. B. Pi, Z. Y. Wang, and M. Q. Wang, “Hydrothermal synthesis and luminescence behavior of rare-earth-doped NaLa(WO4)2 powders,” J. Solid State Chem.178(3), 825–830 (2005).
[CrossRef]

2004 (2)

S. Neeraj, N. Kijima, and A. K. Cheetham, “Novel red phosphors for solid-state lighting: the system NaM(WO4)2-x(MoO4)x:Eu3+ (M=Gd, Y, Bi),” Chem. Phys. Lett.387(1-3), 2–6 (2004).
[CrossRef]

J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
[CrossRef]

2003 (1)

C. A. Kodaira, H. F. Brito, O. L. Malta, and O. A. Serra, “Luminescence and energy transfer of the europium (III) tungstate obtained via the Pechini method,” J. Lumin.101(1-2), 11–21 (2003).
[CrossRef]

2000 (1)

B. Li, Z. N. Gu, J. H. Lin, and M. Z. Su, “X-ray luminescence properties of rare-earth doped orthotantalate,” Mater. Res. Bull.35(12), 1921–1931 (2000).
[CrossRef]

1976 (1)

R. D. Shannon, “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystallogr. A32(5), 751–767 (1976).
[CrossRef]

Aguiló, M.

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

Bae, K. M.

Brik, M. G.

D. Kasprowicz, M. G. Brik, A. Majchrowski, E. Michalski, and E. Mykowska, “Spectroscopic studies of Nd3+ and Er3+ in KGd(WO4)2 single crystals,” J. Lumin.130(4), 623–630 (2010).
[CrossRef]

Brito, H. F.

C. A. Kodaira, H. F. Brito, O. L. Malta, and O. A. Serra, “Luminescence and energy transfer of the europium (III) tungstate obtained via the Pechini method,” J. Lumin.101(1-2), 11–21 (2003).
[CrossRef]

Can, N.

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

Cano-Torres, J. M.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Carvajal, J. J.

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

Cascales, C.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Cheetham, A. K.

S. Neeraj, N. Kijima, and A. K. Cheetham, “Novel red phosphors for solid-state lighting: the system NaM(WO4)2-x(MoO4)x:Eu3+ (M=Gd, Y, Bi),” Chem. Phys. Lett.387(1-3), 2–6 (2004).
[CrossRef]

Chen, M. H.

Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
[CrossRef]

Chen, T. M.

C. H. Chiu, M. F. Wang, C. S. Lee, and T. M. Chen, “Structural, spectroscopic and photoluminescence studies of LiEu(WO4)2-x(MoO4)x as a near-UV convertible phosphor,” J. Solid State Chem.180(2), 619–627 (2007).
[CrossRef]

Chiu, C. H.

C. H. Chiu, M. F. Wang, C. S. Lee, and T. M. Chen, “Structural, spectroscopic and photoluminescence studies of LiEu(WO4)2-x(MoO4)x as a near-UV convertible phosphor,” J. Solid State Chem.180(2), 619–627 (2007).
[CrossRef]

Díaz, F.

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

Ege, A.

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

Fan, X. P.

F. Wang, X. P. Fan, D. B. Pi, Z. Y. Wang, and M. Q. Wang, “Hydrothermal synthesis and luminescence behavior of rare-earth-doped NaLa(WO4)2 powders,” J. Solid State Chem.178(3), 825–830 (2005).
[CrossRef]

Galceran, M.

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

Gao, J.

S. K. Shi, X. R. Liu, J. Gao, and J. Zhou, “Spectroscopic properties and intense red-light emission of (Ca, Eu, M)WO4 (M=Mg, Zn, Li),” Spectrochim. Acta, Part A69(2), 396–399 (2008).
[CrossRef]

Gluchowski, P.

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

Gong, M. L.

Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
[CrossRef]

Griebner, U.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Gu, Z. N.

B. Li, Z. N. Gu, J. H. Lin, and M. Z. Su, “X-ray luminescence properties of rare-earth doped orthotantalate,” Mater. Res. Bull.35(12), 1921–1931 (2000).
[CrossRef]

Han, X.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Hanuza, J.

M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
[CrossRef]

Hesse, S.

J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
[CrossRef]

Huang, Y. J.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

Imanaka, N.

S. W. Kim, K. Jyoko, T. Masui, and N. Imanaka, “Synthesis of green-emitting (La,Gd)OBr:Tb3+ phosphors,” Materials3(4), 2506–2515 (2010).
[CrossRef]

Indrea, E.

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

Jia, G.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

Jung, P. G.

Jyoko, K.

S. W. Kim, K. Jyoko, T. Masui, and N. Imanaka, “Synthesis of green-emitting (La,Gd)OBr:Tb3+ phosphors,” Materials3(4), 2506–2515 (2010).
[CrossRef]

Karali, T.

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

Karsu, E. C.

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

Kasprowicz, D.

D. Kasprowicz, M. G. Brik, A. Majchrowski, E. Michalski, and E. Mykowska, “Spectroscopic studies of Nd3+ and Er3+ in KGd(WO4)2 single crystals,” J. Lumin.130(4), 623–630 (2010).
[CrossRef]

Kijima, N.

S. Neeraj, N. Kijima, and A. K. Cheetham, “Novel red phosphors for solid-state lighting: the system NaM(WO4)2-x(MoO4)x:Eu3+ (M=Gd, Y, Bi),” Chem. Phys. Lett.387(1-3), 2–6 (2004).
[CrossRef]

Kim, H. K.

Kim, S. W.

S. W. Kim, K. Jyoko, T. Masui, and N. Imanaka, “Synthesis of green-emitting (La,Gd)OBr:Tb3+ phosphors,” Materials3(4), 2506–2515 (2010).
[CrossRef]

Kim, T.

T. Woo and T. Kim, “Light collection enhancement of the digital x-ray detector using Gd2O2S:Tb and CsI:Tl phosphors in the aspect of nano-scale light dispersions,” Radiat. Phys. Chem.81(1), 12–15 (2012).
[CrossRef]

Ko, J. S.

Kodaira, C. A.

C. A. Kodaira, H. F. Brito, O. L. Malta, and O. A. Serra, “Luminescence and energy transfer of the europium (III) tungstate obtained via the Pechini method,” J. Lumin.101(1-2), 11–21 (2003).
[CrossRef]

Kolb, R.

J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
[CrossRef]

Koopmann, P.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Kränkel, C.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Lee, C. H.

Lee, C. S.

C. H. Chiu, M. F. Wang, C. S. Lee, and T. M. Chen, “Structural, spectroscopic and photoluminescence studies of LiEu(WO4)2-x(MoO4)x as a near-UV convertible phosphor,” J. Solid State Chem.180(2), 619–627 (2007).
[CrossRef]

Lee, J. M.

Lee, S. M.

Li, B.

B. Li, Z. N. Gu, J. H. Lin, and M. Z. Su, “X-ray luminescence properties of rare-earth doped orthotantalate,” Mater. Res. Bull.35(12), 1921–1931 (2000).
[CrossRef]

Li, L.

X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
[CrossRef]

Li, M. J.

X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
[CrossRef]

Liang, H. B.

Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
[CrossRef]

Lim, C. H.

Lin, J. H.

B. Li, Z. N. Gu, J. H. Lin, and M. Z. Su, “X-ray luminescence properties of rare-earth doped orthotantalate,” Mater. Res. Bull.35(12), 1921–1931 (2000).
[CrossRef]

Liu, K.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

Liu, X. R.

S. K. Shi, X. R. Liu, J. Gao, and J. Zhou, “Spectroscopic properties and intense red-light emission of (Ca, Eu, M)WO4 (M=Mg, Zn, Li),” Spectrochim. Acta, Part A69(2), 396–399 (2008).
[CrossRef]

Macalik, B.

M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
[CrossRef]

Macalik, L.

M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
[CrossRef]

Maczka, M.

M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
[CrossRef]

Majchrowski, A.

M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
[CrossRef]

D. Kasprowicz, M. G. Brik, A. Majchrowski, E. Michalski, and E. Mykowska, “Spectroscopic studies of Nd3+ and Er3+ in KGd(WO4)2 single crystals,” J. Lumin.130(4), 623–630 (2010).
[CrossRef]

Malta, O. L.

C. A. Kodaira, H. F. Brito, O. L. Malta, and O. A. Serra, “Luminescence and energy transfer of the europium (III) tungstate obtained via the Pechini method,” J. Lumin.101(1-2), 11–21 (2003).
[CrossRef]

Masui, T.

S. W. Kim, K. Jyoko, T. Masui, and N. Imanaka, “Synthesis of green-emitting (La,Gd)OBr:Tb3+ phosphors,” Materials3(4), 2506–2515 (2010).
[CrossRef]

Mateos, X.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

Michalski, E.

D. Kasprowicz, M. G. Brik, A. Majchrowski, E. Michalski, and E. Mykowska, “Spectroscopic studies of Nd3+ and Er3+ in KGd(WO4)2 single crystals,” J. Lumin.130(4), 623–630 (2010).
[CrossRef]

Morar, M.

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

Mykowska, E.

D. Kasprowicz, M. G. Brik, A. Majchrowski, E. Michalski, and E. Mykowska, “Spectroscopic studies of Nd3+ and Er3+ in KGd(WO4)2 single crystals,” J. Lumin.130(4), 623–630 (2010).
[CrossRef]

Neeraj, S.

S. Neeraj, N. Kijima, and A. K. Cheetham, “Novel red phosphors for solid-state lighting: the system NaM(WO4)2-x(MoO4)x:Eu3+ (M=Gd, Y, Bi),” Chem. Phys. Lett.387(1-3), 2–6 (2004).
[CrossRef]

Ning, G.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

Petrov, V.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Pi, D. B.

F. Wang, X. P. Fan, D. B. Pi, Z. Y. Wang, and M. Q. Wang, “Hydrothermal synthesis and luminescence behavior of rare-earth-doped NaLa(WO4)2 powders,” J. Solid State Chem.178(3), 825–830 (2005).
[CrossRef]

Popovici, E. J.

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

Pu, X. P.

X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
[CrossRef]

Pujol, M. C.

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

Qian, X. H.

X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
[CrossRef]

Rico, M.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Schlapp, M.

J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
[CrossRef]

Schmechel, R.

J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
[CrossRef]

Serra, O. A.

C. A. Kodaira, H. F. Brito, O. L. Malta, and O. A. Serra, “Luminescence and energy transfer of the europium (III) tungstate obtained via the Pechini method,” J. Lumin.101(1-2), 11–21 (2003).
[CrossRef]

Serrano, M. D.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Shannon, R. D.

R. D. Shannon, “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystallogr. A32(5), 751–767 (1976).
[CrossRef]

Shi, S. K.

S. K. Shi, X. R. Liu, J. Gao, and J. Zhou, “Spectroscopic properties and intense red-light emission of (Ca, Eu, M)WO4 (M=Mg, Zn, Li),” Spectrochim. Acta, Part A69(2), 396–399 (2008).
[CrossRef]

Song, Y. H.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

Strek, W.

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

Su, M. Z.

B. Li, Z. N. Gu, J. H. Lin, and M. Z. Su, “X-ray luminescence properties of rare-earth doped orthotantalate,” Mater. Res. Bull.35(12), 1921–1931 (2000).
[CrossRef]

Su, Q.

Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
[CrossRef]

Swirkowicz, M.

M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
[CrossRef]

von Seggern, H.

J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
[CrossRef]

Wang, F.

F. Wang, X. P. Fan, D. B. Pi, Z. Y. Wang, and M. Q. Wang, “Hydrothermal synthesis and luminescence behavior of rare-earth-doped NaLa(WO4)2 powders,” J. Solid State Chem.178(3), 825–830 (2005).
[CrossRef]

Wang, M. F.

C. H. Chiu, M. F. Wang, C. S. Lee, and T. M. Chen, “Structural, spectroscopic and photoluminescence studies of LiEu(WO4)2-x(MoO4)x as a near-UV convertible phosphor,” J. Solid State Chem.180(2), 619–627 (2007).
[CrossRef]

Wang, M. Q.

F. Wang, X. P. Fan, D. B. Pi, Z. Y. Wang, and M. Q. Wang, “Hydrothermal synthesis and luminescence behavior of rare-earth-doped NaLa(WO4)2 powders,” J. Solid State Chem.178(3), 825–830 (2005).
[CrossRef]

Wang, Q.

Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
[CrossRef]

Wang, Z. L.

Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
[CrossRef]

Wang, Z. Y.

F. Wang, X. P. Fan, D. B. Pi, Z. Y. Wang, and M. Q. Wang, “Hydrothermal synthesis and luminescence behavior of rare-earth-doped NaLa(WO4)2 powders,” J. Solid State Chem.178(3), 825–830 (2005).
[CrossRef]

Woo, T.

T. Woo and T. Kim, “Light collection enhancement of the digital x-ray detector using Gd2O2S:Tb and CsI:Tl phosphors in the aspect of nano-scale light dispersions,” Radiat. Phys. Chem.81(1), 12–15 (2012).
[CrossRef]

Wu, S. T.

X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
[CrossRef]

Yang, M.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

You, H. P.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

Yun, S.

Zaldo, C.

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Zhang, D. F.

X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
[CrossRef]

Zhang, L. H.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

Zheng, Y. H.

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

Zhou, J.

S. K. Shi, X. R. Liu, J. Gao, and J. Zhou, “Spectroscopic properties and intense red-light emission of (Ca, Eu, M)WO4 (M=Mg, Zn, Li),” Spectrochim. Acta, Part A69(2), 396–399 (2008).
[CrossRef]

Zimmermann, J.

J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
[CrossRef]

Acta Crystallogr. A (1)

R. D. Shannon, “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystallogr. A32(5), 751–767 (1976).
[CrossRef]

Chem. Phys. Lett. (1)

S. Neeraj, N. Kijima, and A. K. Cheetham, “Novel red phosphors for solid-state lighting: the system NaM(WO4)2-x(MoO4)x:Eu3+ (M=Gd, Y, Bi),” Chem. Phys. Lett.387(1-3), 2–6 (2004).
[CrossRef]

Cryst. Eng. Comm. (1)

Y. H. Zheng, H. P. You, K. Liu, Y. H. Song, G. Jia, Y. J. Huang, M. Yang, L. H. Zhang, and G. Ning, “Facile selective synthesis and luminescence behavior of hierarchical NaY(WO4)2:Eu3+ and Y6WO12:Eu3+,” Cryst. Eng. Comm.13(8), 3001–3007 (2011).
[CrossRef]

J. Lumin. (4)

C. A. Kodaira, H. F. Brito, O. L. Malta, and O. A. Serra, “Luminescence and energy transfer of the europium (III) tungstate obtained via the Pechini method,” J. Lumin.101(1-2), 11–21 (2003).
[CrossRef]

X. H. Qian, X. P. Pu, D. F. Zhang, L. Li, M. J. Li, and S. T. Wu, “Combustion synthesis and luminescence properties of NaY1-xEux(WO4)2 phosphors,” J. Lumin.131(8), 1692–1695 (2011).
[CrossRef]

E. C. Karsu, E. J. Popovici, A. Ege, M. Morar, E. Indrea, T. Karali, and N. Can, “Luminescence study of some yttrium tantalate-based phosphors,” J. Lumin.131(5), 1052–1057 (2011).
[CrossRef]

D. Kasprowicz, M. G. Brik, A. Majchrowski, E. Michalski, and E. Mykowska, “Spectroscopic studies of Nd3+ and Er3+ in KGd(WO4)2 single crystals,” J. Lumin.130(4), 623–630 (2010).
[CrossRef]

J. Phys. D Appl. Phys. (1)

J. Zimmermann, R. Kolb, S. Hesse, M. Schlapp, R. Schmechel, and H. von Seggern, “Preparation induced F-center transformation in BaFBr:Eu2+,” J. Phys. D Appl. Phys.37(17), 2352–2357 (2004).
[CrossRef]

J. Solid State Chem. (2)

F. Wang, X. P. Fan, D. B. Pi, Z. Y. Wang, and M. Q. Wang, “Hydrothermal synthesis and luminescence behavior of rare-earth-doped NaLa(WO4)2 powders,” J. Solid State Chem.178(3), 825–830 (2005).
[CrossRef]

C. H. Chiu, M. F. Wang, C. S. Lee, and T. M. Chen, “Structural, spectroscopic and photoluminescence studies of LiEu(WO4)2-x(MoO4)x as a near-UV convertible phosphor,” J. Solid State Chem.180(2), 619–627 (2007).
[CrossRef]

Mater. Res. Bull. (1)

B. Li, Z. N. Gu, J. H. Lin, and M. Z. Su, “X-ray luminescence properties of rare-earth doped orthotantalate,” Mater. Res. Bull.35(12), 1921–1931 (2000).
[CrossRef]

Materials (1)

S. W. Kim, K. Jyoko, T. Masui, and N. Imanaka, “Synthesis of green-emitting (La,Gd)OBr:Tb3+ phosphors,” Materials3(4), 2506–2515 (2010).
[CrossRef]

Opt. Express (1)

Opt. Mater. (2)

M. Galceran, M. C. Pujol, P. Gluchowski, W. Strek, J. J. Carvajal, X. Mateos, M. Aguiló, and F. Díaz, “Synthesis, structural and optical characterization of Eu:KYb(WO4)2 nanocrystals: A promising red phosphor,” Opt. Mater.32(11), 1493–1500 (2010).
[CrossRef]

M. Mączka, L. Macalik, B. Macalik, A. Majchrowski, M. Swirkowicz, and J. Hanuza, “Phonon, optical and dielectric properties of RbNd(WO4)2 laser crystal,” Opt. Mater.32(11), 1463–1470 (2010).
[CrossRef]

Phys. Rev. B (1)

J. M. Cano-Torres, M. Rico, X. Han, M. D. Serrano, C. Cascales, C. Zaldo, V. Petrov, U. Griebner, X. Mateos, P. Koopmann, and C. Kränkel, “Comparative study of crystallographic, spectroscopic, and laser properties of Tm3+ in NaT(WO4)2 (T =La, Gd, Y and Lu) disordered single crystals,” Phys. Rev. B84(17), 174207 (2011).
[CrossRef]

Phys. Status Solidi A (1)

Z. L. Wang, H. B. Liang, Q. Wang, M. H. Chen, M. L. Gong, and Q. Su, “Novel red phosphor of Eu3+, Bi3+ coactivated double tungstates,” Phys. Status Solidi A206(7), 1589–1593 (2009).
[CrossRef]

Radiat. Phys. Chem. (1)

T. Woo and T. Kim, “Light collection enhancement of the digital x-ray detector using Gd2O2S:Tb and CsI:Tl phosphors in the aspect of nano-scale light dispersions,” Radiat. Phys. Chem.81(1), 12–15 (2012).
[CrossRef]

Spectrochim. Acta, Part A (1)

S. K. Shi, X. R. Liu, J. Gao, and J. Zhou, “Spectroscopic properties and intense red-light emission of (Ca, Eu, M)WO4 (M=Mg, Zn, Li),” Spectrochim. Acta, Part A69(2), 396–399 (2008).
[CrossRef]

Other (2)

G. Blasse and B. C. Grabmaier, Luminescent Materials (Spinger-Verlag, 1994), Chap. 8.

G. K. Liu and B. Jacquier, Spectroscopic Properties of Rare Earths in Optical Materials (Tsinghua University Press, 2005), Chap. 10.

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Figures (8)

Fig. 1
Fig. 1

XRD patterns of samples NaLu(1-x)Eux(WO4)2 (x = 0.05, 0.10, 0.15, 0.20, 0.50, 1.0) and JCPDS 79-1118 [NaLa(WO4)2] as a reference.

Fig. 2
Fig. 2

Rietveld structural refinement of the powder XRD profile of sample NaLu0.5Eu0.5(WO4)2, data (black line), fitted (red pentacle) and difference profiles are displayed along with expected reflection position.

Fig. 3
Fig. 3

SEM image and EDS spectrum of the sample NaLu0.5Eu0.5(WO4)2.

Fig. 4
Fig. 4

Emission spectrum of sample NaLu0.5Eu0.5(WO4)2 (λex = 395 nm) at 10 K. The inset is the tenfold magnified spectrum in the range from 500 nm to 600 nm.

Fig. 5
Fig. 5

Emission spectra of samples NaLu(1-x)Eux(WO4)2 (x = 0.05, 0.10, 0.15, 0.20, 0.50, 1.0) (λex = 395 nm) at RT. The inset is the concentration dependence of the relative emission intensity due to 5D07F2 transition at 615 nm.

Fig. 6
Fig. 6

Excitation spectra of sample NaLu0.5Eu0.5(WO4)2 (λem = 615 nm) from 10 K to 400 K. The right-up corner inset shows the temperature dependence of the excitation intensities at 265 nm and 395 nm, respectively.

Fig. 7
Fig. 7

X-ray excited emission spectrum of sample NaLu0.5Eu0.5(WO4)2 at RT. The inset is the Eu3+ doping concentration dependence of the relative emission intensity at 615 nm from 5D07F2 transition.

Fig. 8
Fig. 8

Luminescence decay curves of NaLu(1-x)Eux(WO4)2 (x = 0.05, 0.50, 1.0) at RT.

Tables (1)

Tables Icon

Table 1 Rietveld Refinement and Crystal Structural Data of Samples NaLu(1-x)Eux(WO4)2 (x = 0.05, 0.10, 0.15, 0.20, 0.50, 1.0)

Equations (1)

Equations on this page are rendered with MathJax. Learn more.

2NaHC O 3 +(1x)L u 2 O 3 +xE u 2 O 3 +4W O 3 1273K,4h 2NaL u (1x) E u x (W O 4 ) 2 +2C O 2 + H 2 O

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