Abstract

The terbium-activated yttrium tantalite (YTaO4:Tb3+) phosphor is of great interest due to the interesting spectroscopic properties of rare earth ions in crystals and also practical use in x-ray imaging. Using the group-theoretical approach, we analyze the selection rules for the transition between Stark components of Tb3+ in symmetry of the actual crystal field and the polarization for the allowed transitions. The luminescence upon UV, vacuum-ultraviolet (VUV), and x-ray excitation is presented and discussed. The YTaO4:Tb3+ phosphors are found to be efficient VUV-excited luminescent materials that could be used not only in x-ray intensifying screens, but also in mercury-free fluorescent lamps or plasma display panels.

© 2008 Optical Society of America

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References

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  1. G. Wolten, “The structure of the M′-phase of YTaO4, a third Fergusonite polymorph,” Acta Crystallogr. 23, 939-944 (1967).
    [CrossRef]
  2. L. H. Brixner and H. Y. Chen, “On the structural and luminescent properties of the M′LnTaO4 rare earth tantalates,” J. Electrochem. Soc. 130, 2435-2443 (1983).
    [CrossRef]
  3. G. Blasse and A. Bril, “Luminescence phenomena in compounds with Fergusonite structure,” J. Lumin. 3, 109-131(1970).
    [CrossRef]
  4. M. J. J. Lammers and G. Blasse, “Energy transfer phenomena in Tb3+-activated gadolinium tantalite (GaTaO4),” Mater. Res. Bull. 19, 759-768 (1984).
    [CrossRef]
  5. G. Blasse, “Vibrational spectra of yttrium niobate and tantalate,” J. Solid State Chem. 7, 169-171 (1973).
    [CrossRef]
  6. V. K. Trunov, L. N. Kinzhibalo, V. A. Efremov, and V. G. Krongauz, “About M′-structure of rare earth orthotantalates,” Dokl. Akad. Nauk USSR 260, 103-106 (1981).
  7. B. S. Tsukerblat, Group Theory in Chemistry and Spectroscopy (Dover, 2006).
  8. G. F. Koster, J. O. Dimmok, R. G. Wheeler, and H. Statz, Properties of the Thirty-Two Point Groups (MIT Press, 1963).
  9. C. K. Jorgensen, “Electron transfer spectra,” Prog. Inorg. Chem. 12, 101-158 (1970).
    [CrossRef]
  10. L. Pauling, “Nature of the Chemical Bond,” 3rd ed. (Cornell U. Press, 1960), pp. 88-107.
  11. I. Gerard, K. C. Krupa, E. Simoni, and P. Martin, “Investigation of charge transfer 02−-Ln3+ and F-Ln3+ in LaF3:(Ln3+,O2−) and YF3:(Ln3+,O2−) systems,” J. Alloys Compd. 207/208, 120-127 (1994).
    [CrossRef]

1994 (1)

I. Gerard, K. C. Krupa, E. Simoni, and P. Martin, “Investigation of charge transfer 02−-Ln3+ and F-Ln3+ in LaF3:(Ln3+,O2−) and YF3:(Ln3+,O2−) systems,” J. Alloys Compd. 207/208, 120-127 (1994).
[CrossRef]

1984 (1)

M. J. J. Lammers and G. Blasse, “Energy transfer phenomena in Tb3+-activated gadolinium tantalite (GaTaO4),” Mater. Res. Bull. 19, 759-768 (1984).
[CrossRef]

1983 (1)

L. H. Brixner and H. Y. Chen, “On the structural and luminescent properties of the M′LnTaO4 rare earth tantalates,” J. Electrochem. Soc. 130, 2435-2443 (1983).
[CrossRef]

1981 (1)

V. K. Trunov, L. N. Kinzhibalo, V. A. Efremov, and V. G. Krongauz, “About M′-structure of rare earth orthotantalates,” Dokl. Akad. Nauk USSR 260, 103-106 (1981).

1973 (1)

G. Blasse, “Vibrational spectra of yttrium niobate and tantalate,” J. Solid State Chem. 7, 169-171 (1973).
[CrossRef]

1970 (2)

G. Blasse and A. Bril, “Luminescence phenomena in compounds with Fergusonite structure,” J. Lumin. 3, 109-131(1970).
[CrossRef]

C. K. Jorgensen, “Electron transfer spectra,” Prog. Inorg. Chem. 12, 101-158 (1970).
[CrossRef]

1967 (1)

G. Wolten, “The structure of the M′-phase of YTaO4, a third Fergusonite polymorph,” Acta Crystallogr. 23, 939-944 (1967).
[CrossRef]

Blasse, G.

M. J. J. Lammers and G. Blasse, “Energy transfer phenomena in Tb3+-activated gadolinium tantalite (GaTaO4),” Mater. Res. Bull. 19, 759-768 (1984).
[CrossRef]

G. Blasse, “Vibrational spectra of yttrium niobate and tantalate,” J. Solid State Chem. 7, 169-171 (1973).
[CrossRef]

G. Blasse and A. Bril, “Luminescence phenomena in compounds with Fergusonite structure,” J. Lumin. 3, 109-131(1970).
[CrossRef]

Bril, A.

G. Blasse and A. Bril, “Luminescence phenomena in compounds with Fergusonite structure,” J. Lumin. 3, 109-131(1970).
[CrossRef]

Brixner, L. H.

L. H. Brixner and H. Y. Chen, “On the structural and luminescent properties of the M′LnTaO4 rare earth tantalates,” J. Electrochem. Soc. 130, 2435-2443 (1983).
[CrossRef]

Chen, H. Y.

L. H. Brixner and H. Y. Chen, “On the structural and luminescent properties of the M′LnTaO4 rare earth tantalates,” J. Electrochem. Soc. 130, 2435-2443 (1983).
[CrossRef]

Dimmok, J. O.

G. F. Koster, J. O. Dimmok, R. G. Wheeler, and H. Statz, Properties of the Thirty-Two Point Groups (MIT Press, 1963).

Efremov, V. A.

V. K. Trunov, L. N. Kinzhibalo, V. A. Efremov, and V. G. Krongauz, “About M′-structure of rare earth orthotantalates,” Dokl. Akad. Nauk USSR 260, 103-106 (1981).

Gerard, I.

I. Gerard, K. C. Krupa, E. Simoni, and P. Martin, “Investigation of charge transfer 02−-Ln3+ and F-Ln3+ in LaF3:(Ln3+,O2−) and YF3:(Ln3+,O2−) systems,” J. Alloys Compd. 207/208, 120-127 (1994).
[CrossRef]

Jorgensen, C. K.

C. K. Jorgensen, “Electron transfer spectra,” Prog. Inorg. Chem. 12, 101-158 (1970).
[CrossRef]

Kinzhibalo, L. N.

V. K. Trunov, L. N. Kinzhibalo, V. A. Efremov, and V. G. Krongauz, “About M′-structure of rare earth orthotantalates,” Dokl. Akad. Nauk USSR 260, 103-106 (1981).

Koster, G. F.

G. F. Koster, J. O. Dimmok, R. G. Wheeler, and H. Statz, Properties of the Thirty-Two Point Groups (MIT Press, 1963).

Krongauz, V. G.

V. K. Trunov, L. N. Kinzhibalo, V. A. Efremov, and V. G. Krongauz, “About M′-structure of rare earth orthotantalates,” Dokl. Akad. Nauk USSR 260, 103-106 (1981).

Krupa, K. C.

I. Gerard, K. C. Krupa, E. Simoni, and P. Martin, “Investigation of charge transfer 02−-Ln3+ and F-Ln3+ in LaF3:(Ln3+,O2−) and YF3:(Ln3+,O2−) systems,” J. Alloys Compd. 207/208, 120-127 (1994).
[CrossRef]

Lammers, M. J. J.

M. J. J. Lammers and G. Blasse, “Energy transfer phenomena in Tb3+-activated gadolinium tantalite (GaTaO4),” Mater. Res. Bull. 19, 759-768 (1984).
[CrossRef]

Martin, P.

I. Gerard, K. C. Krupa, E. Simoni, and P. Martin, “Investigation of charge transfer 02−-Ln3+ and F-Ln3+ in LaF3:(Ln3+,O2−) and YF3:(Ln3+,O2−) systems,” J. Alloys Compd. 207/208, 120-127 (1994).
[CrossRef]

Pauling, L.

L. Pauling, “Nature of the Chemical Bond,” 3rd ed. (Cornell U. Press, 1960), pp. 88-107.

Simoni, E.

I. Gerard, K. C. Krupa, E. Simoni, and P. Martin, “Investigation of charge transfer 02−-Ln3+ and F-Ln3+ in LaF3:(Ln3+,O2−) and YF3:(Ln3+,O2−) systems,” J. Alloys Compd. 207/208, 120-127 (1994).
[CrossRef]

Statz, H.

G. F. Koster, J. O. Dimmok, R. G. Wheeler, and H. Statz, Properties of the Thirty-Two Point Groups (MIT Press, 1963).

Trunov, V. K.

V. K. Trunov, L. N. Kinzhibalo, V. A. Efremov, and V. G. Krongauz, “About M′-structure of rare earth orthotantalates,” Dokl. Akad. Nauk USSR 260, 103-106 (1981).

Tsukerblat, B. S.

B. S. Tsukerblat, Group Theory in Chemistry and Spectroscopy (Dover, 2006).

Wheeler, R. G.

G. F. Koster, J. O. Dimmok, R. G. Wheeler, and H. Statz, Properties of the Thirty-Two Point Groups (MIT Press, 1963).

Wolten, G.

G. Wolten, “The structure of the M′-phase of YTaO4, a third Fergusonite polymorph,” Acta Crystallogr. 23, 939-944 (1967).
[CrossRef]

Acta Crystallogr. (1)

G. Wolten, “The structure of the M′-phase of YTaO4, a third Fergusonite polymorph,” Acta Crystallogr. 23, 939-944 (1967).
[CrossRef]

Dokl. Akad. Nauk USSR (1)

V. K. Trunov, L. N. Kinzhibalo, V. A. Efremov, and V. G. Krongauz, “About M′-structure of rare earth orthotantalates,” Dokl. Akad. Nauk USSR 260, 103-106 (1981).

J. Alloys Compd. (1)

I. Gerard, K. C. Krupa, E. Simoni, and P. Martin, “Investigation of charge transfer 02−-Ln3+ and F-Ln3+ in LaF3:(Ln3+,O2−) and YF3:(Ln3+,O2−) systems,” J. Alloys Compd. 207/208, 120-127 (1994).
[CrossRef]

J. Electrochem. Soc. (1)

L. H. Brixner and H. Y. Chen, “On the structural and luminescent properties of the M′LnTaO4 rare earth tantalates,” J. Electrochem. Soc. 130, 2435-2443 (1983).
[CrossRef]

J. Lumin. (1)

G. Blasse and A. Bril, “Luminescence phenomena in compounds with Fergusonite structure,” J. Lumin. 3, 109-131(1970).
[CrossRef]

J. Solid State Chem. (1)

G. Blasse, “Vibrational spectra of yttrium niobate and tantalate,” J. Solid State Chem. 7, 169-171 (1973).
[CrossRef]

Mater. Res. Bull. (1)

M. J. J. Lammers and G. Blasse, “Energy transfer phenomena in Tb3+-activated gadolinium tantalite (GaTaO4),” Mater. Res. Bull. 19, 759-768 (1984).
[CrossRef]

Prog. Inorg. Chem. (1)

C. K. Jorgensen, “Electron transfer spectra,” Prog. Inorg. Chem. 12, 101-158 (1970).
[CrossRef]

Other (3)

L. Pauling, “Nature of the Chemical Bond,” 3rd ed. (Cornell U. Press, 1960), pp. 88-107.

B. S. Tsukerblat, Group Theory in Chemistry and Spectroscopy (Dover, 2006).

G. F. Koster, J. O. Dimmok, R. G. Wheeler, and H. Statz, Properties of the Thirty-Two Point Groups (MIT Press, 1963).

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Figures (4)

Fig. 1
Fig. 1

Splitting of D J 2 S + 1 multiplets for Tb 3 + in the crystal field of the C 2 symmetry site.

Fig. 2
Fig. 2

PLE (a, b) and emission (c, d) spectra of YTa O 4 (a, c) and YTa O 4 : Tb 3 + (b, d).

Fig. 3
Fig. 3

PLE and emission spectra from YTa O 4 : Tb 3 + under VUV excitation.

Fig. 4
Fig. 4

Emission spectra of YTa O 4 : Tb 3 + under x-ray excitation. Fragments of the transitions D 4 5 F J 7 ( J = 2 , 1 , 0 ) illustrating the specific lines of Tb 3 + are also shown in the figure.

Tables (2)

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Table 1 Assignment of Crystal Field Multiplets for the Tb 3 + Ion in the C 2 Point Group

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Table 2 Selection Rules and Polarizations

Equations (3)

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D 4 , 5 D 3 5 F 6 , 7 F 5 , 7 F 4 , 7 F 3 , 7 F 2 , 7 F 1 , 7 F 0 7 .
D 6 + 7 A + 6 B , D 5 + 5 A + 6 B , D 4 + 5 A + 4 B , D 3 + 3 A + 4 B , D 2 + 3 A + 2 B , D 1 + A + 2 B , D 0 + A .
E CT = [ ( X ) ( M ) ] × 30 , 000 cm 1 .

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