Abstract

The influence of lithium excess and calcination temperature on the luminescence properties of the LiAl5O8:Eu under VUV excitation was investigated. The presence of both broad bands and sharp peaks in the VUV and X-ray emission spectra suggests the presence of Eu2+, even in absence of reducing atmosphere in the synthesis. The VUV excitation spectra indicated a band gap of 8.5 eV while the UV excited one showed the Eu3+ charge transfer transition starting at 3.9 eV. These values indicate that Eu2+ is stable in this host since its ground state is below the Fermi level of the host (ca. 4.1 eV). The relation between the intensity of Eu2+ and Eu3+ emissions showed that the reduction is favored at higher temperatures and lower Li content, leading to the proposition of a reduction mechanism based on the incorporation of charge compensation defects formed in the aliovalent doping of Eu3+ in Li+ sites.

© 2016 Optical Society of America

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    [Crossref]
  2. S. S. Pitale, V. Kumar, I. M. Nagpure, O. M. Ntwaeaborwa, E. Coetsee, and H. C. Swart, “Cathodoluminescent properties and surface characterization of bluish-white LiAl5O8:Tb phosphor,” J. Appl. Phys. 109(1), 013105 (2011).
    [Crossref]
  3. R. T. Wegh, H. Donker, A. Meijerink, R. J. Lamminmäki, and J. Hölsä, “Vacuum-ultraviolet spectroscopy and quantum cutting for Gd3+ in LiYF4,” Phys. Rev. B 56(21), 13841–13848 (1997).
    [Crossref]
  4. D. Wang, Y. Wang, and L. Wang, “Photoluminescence properties of Sr(Y, Gd)2O4:Eu3+ under VUV excitation,” J. Lumin. 126(1), 135–138 (2007).
    [Crossref]
  5. P. Dorenbos, “The 5d level positions of the trivalent lanthanides in inorganic compounds,” J. Lumin. 91(3-4), 155–176 (2000).
    [Crossref]
  6. P. K. Sharma, R. K. Dutta, and A. C. Pandey, “Performance of YAG:Eu3+, YAG:Tb3+ and BAM:Eu2+ plasma display nanophosphors,” J. Nanopart. Res. 14(3), 731 (2012).
    [Crossref]
  7. J. T. Ingle, A. B. Gawande, R. P. Sonekar, P. A. Nagpure, and S. K. Omanwar, “Synthesis and photoluminescence of inorganic borate host red emitting VUV phosphor YCaBO4:Eu3+,” AIP Conf. Proc. 1536, 895–896 (2013).
    [Crossref]
  8. T. Abritta and F. S. Barros, “Luminescence and photoacoustic measurements of LiAl5O8: Fe3+,” J. Lumin. 40–41, 187–188 (1988).
    [Crossref]
  9. S. C. Bhargava, “Spin-lattice relaxation of Fe3+ ions in LiAl5O8,” J. Phys. C Solid State Phys. 19(35), 7045–7070 (1986).
    [Crossref]
  10. V. Singh, R. P. S. Chakradhar, J. L. Rao, and D. K. Kim, “EPR and luminescence properties of combustion synthesized LiAl5O8:Mn phosphors,” Mater. Chem. Phys. 110(1), 43–51 (2008).
    [Crossref]
  11. V. Singh, R. P. S. Chakradhar, J. L. Rao, and H. Y. Kwak, “Characterization, EPR and photoluminescence studies of LiAl5O8:Cr phosphors,” Solid State Sci. 11(4), 870–874 (2009).
    [Crossref]
  12. T. R. N. Kutty and M. Nayak, “Cationic distribution and its influence on the luminescent properties of Fe3+-doped LiAl5O8 prepared by wet chemical methods,” J. Alloys Compd. 269(1-2), 75–87 (1998).
    [Crossref]
  13. X. Duan and D. Yuan, “Synthesis and characterization of Co2+-doped lithium aluminum spinel nanocrystals,” J. Non-Cryst. Solids 351(27-29), 2348–2351 (2005).
    [Crossref]
  14. A. P. Jadhav, U. Amol Pawar, B.K. Pal, Kim, and Y.S. Kang, “Synthesis of Monodispersed Red Emitting LiAl5O8: Fe3+ Nanophosphors,” Sci. Adv. Mater. 4(5–6), 597–603 (2012).
    [Crossref]
  15. S. S. Pitale, V. Kumar, I. Nagpure, O. M. Ntwaeaborwa, and H. C. Swart, “Luminescence investigations on LiAl5O8:Tb3+ nanocrystalline phosphors,” Curr. Appl. Phys. 11(3), 341–345 (2011).
    [Crossref]
  16. O. A. Lopez, J. McKittrick, and L. E. Shea, “Fluorescence properties of polycrystalline Tm3+-activated Y3Al5O12 and Tm3+-Li+ co-activated Y3Al5O12 in the visible and near IR ranges,” J. Lumin. 71(1), 1–11 (1997).
    [Crossref]
  17. Y. Guo, D. Wang, and F. Wang, “Effect of Li+ ions doping on microstructure and upconversion luminescence of CeO2: Er3+ translucent ceramics,” Opt. Mater. 42, 390–393 (2015).
    [Crossref]
  18. H. Jin, H. Wu, and L. Tian, “Improved luminescence of Y2MoO6:Eu3+ by doping Li+ ions for light-emitting diode applications,” J. Lumin. 132(5), 1188–1191 (2012).
    [Crossref]
  19. Q. Du, G. Zhou, J. Zhou, X. Jia, and H. Zhou, “Enhanced luminescence of novel Y2Zr2O7:Dy3+ phosphors by Li+ co-doping,” J. Alloys Compd. 552, 152–156 (2013).
    [Crossref]
  20. O. Kaygili, S. Keser, R. H. Al Orainy, T. Ates, and F. Yakuphanoglu, “In vitro characterization of polyvinyl alcohol assisted hydroxyapatite derived by sol-gel method,” Mater. Sci. Eng. C 35, 239–244 (2014).
    [Crossref] [PubMed]
  21. M. Sivakumar, S. Kanagesan, R. Suresh Babu, S. Jesurani, R. Velmurugan, C. Thirupathi, and T. Kalaivani, “Synthesis of CoFe2O4 powder via PVA assisted sol–gel process,” J. Mater. Sci. Mater. Electron. 23(5), 1045–1049 (2012).
    [Crossref]
  22. R. L. Cavasso-Filho, M. G. P. Homem, R. Landers, and A. N. Brito, “Advances on the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 144–147, 1125–1127 (2005).
    [Crossref]
  23. R. L. Cavasso-Filho, A. F. Lago, M. G. P. Homem, S. Pilling, and A. N. Brito, “Delivering high-purity vacuum ultraviolet photons at the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 156–158, 168–171 (2007).
    [Crossref]
  24. L. C. V. Rodrigues, R. Stefani, H. F. Brito, M. C. F. C. Felinto, J. Hölsä, M. Lastusaari, T. Laamanen, and M. Malkamäki, “Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl2O4:Eu2+, Dy3+,” J. Solid State Chem. 183(10), 2365–2371 (2010).
    [Crossref]
  25. D. Dutczak, T. Jüstel, C. Ronda, and A. Meijerink, “Eu(2+) luminescence in strontium aluminates,” Phys. Chem. Chem. Phys. 17(23), 15236–15249 (2015).
    [Crossref] [PubMed]
  26. R. Famery, F. Queyroux, J.-C. Gilles, and P. Herpin, “Etude structurale de la forme ordonnée de LiAl5O8,” J. Solid State Chem. 30(2), 257–263 (1979).
    [Crossref]
  27. R. D. Shannon, “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystallogr. A 32(5), 751–767 (1976).
    [Crossref]
  28. H. L. Yakel, “A refinement of the crystal structure of monoclinic europium sesquioxide,” Acta Crystallogr. B 35(3), 564–569 (1979).
    [Crossref]
  29. P. Dorenbos, “Systematic behaviour in trivalent lanthanide charge transfer energies,” J. Phys. Condens. Matter 15(49), 8417–8434 (2003).
    [Crossref]
  30. L. van Pieterson, M. F. Reid, R. T. Wegh, S. Soverna, and A. Meijerink, “4fn→ 4fn−1 5d transitions of the light lanthanides: Experiment and theory,” Phys. Rev. B 65(4), 045113 (2002).
    [Crossref]
  31. I. Veljković, D. Poleti, L. J. Karanović, M. Zdujić, and G. Branković, “Solid state synthesis of extra phase-pure Li4Ti5O12 spinel,” Sci. Sinter. 43(3), 343–351 (2011).
    [Crossref]
  32. P. Dorenbos, “Absolute location of lanthanide energy levels and the performance of phosphors,” J. Lumin. 122–123, 315–317 (2007).
    [Crossref]
  33. P. Dorenbos, “Locating lanthanide impurity levels in the forbidden band of host crystals,” J. Lumin. 108(1–4), 301–305 (2004).
    [Crossref]
  34. V. Kumar, A. F. Khan, and S. Chawla, “Intense red-emitting multi-rare-earth doped nanoparticles of YVO4 for spectrum conversion towards improved energy harvesting by solar cells,” J. Phys. D Appl. Phys. 46(36), 365101 (2013).
    [Crossref]
  35. S. Emura, H. Maeda, and M. Nomura, “Variation of optical luminescence X-ray excitation spectra,” Phys. B Condens. Matter. 208–209, 108–110 (1995).
  36. P. Strobel, J. J. Capponi, C. Chaillout, M. Marezio, and J. L. Tholence, “Variations of stoichiometry and cell symmetry in YBa2Cu3O7− x with temperature and oxygen pressure,” Nature 327(6120), 306–308 (1987).
    [Crossref]
  37. P. G. Radaelli, J. D. Jorgensen, A. J. Schultz, J. L. Peng, and R. L. Greene, “Evidence of apical oxygen in Nd2CuOy determined by single-crystal neutron diffraction,” Phys. Rev. B Condens. Matter 49(21), 15322–15326 (1994).
    [Crossref] [PubMed]
  38. L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
    [Crossref]

2016 (1)

L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
[Crossref]

2015 (2)

D. Dutczak, T. Jüstel, C. Ronda, and A. Meijerink, “Eu(2+) luminescence in strontium aluminates,” Phys. Chem. Chem. Phys. 17(23), 15236–15249 (2015).
[Crossref] [PubMed]

Y. Guo, D. Wang, and F. Wang, “Effect of Li+ ions doping on microstructure and upconversion luminescence of CeO2: Er3+ translucent ceramics,” Opt. Mater. 42, 390–393 (2015).
[Crossref]

2014 (1)

O. Kaygili, S. Keser, R. H. Al Orainy, T. Ates, and F. Yakuphanoglu, “In vitro characterization of polyvinyl alcohol assisted hydroxyapatite derived by sol-gel method,” Mater. Sci. Eng. C 35, 239–244 (2014).
[Crossref] [PubMed]

2013 (3)

Q. Du, G. Zhou, J. Zhou, X. Jia, and H. Zhou, “Enhanced luminescence of novel Y2Zr2O7:Dy3+ phosphors by Li+ co-doping,” J. Alloys Compd. 552, 152–156 (2013).
[Crossref]

V. Kumar, A. F. Khan, and S. Chawla, “Intense red-emitting multi-rare-earth doped nanoparticles of YVO4 for spectrum conversion towards improved energy harvesting by solar cells,” J. Phys. D Appl. Phys. 46(36), 365101 (2013).
[Crossref]

J. T. Ingle, A. B. Gawande, R. P. Sonekar, P. A. Nagpure, and S. K. Omanwar, “Synthesis and photoluminescence of inorganic borate host red emitting VUV phosphor YCaBO4:Eu3+,” AIP Conf. Proc. 1536, 895–896 (2013).
[Crossref]

2012 (4)

P. K. Sharma, R. K. Dutta, and A. C. Pandey, “Performance of YAG:Eu3+, YAG:Tb3+ and BAM:Eu2+ plasma display nanophosphors,” J. Nanopart. Res. 14(3), 731 (2012).
[Crossref]

H. Jin, H. Wu, and L. Tian, “Improved luminescence of Y2MoO6:Eu3+ by doping Li+ ions for light-emitting diode applications,” J. Lumin. 132(5), 1188–1191 (2012).
[Crossref]

A. P. Jadhav, U. Amol Pawar, B.K. Pal, Kim, and Y.S. Kang, “Synthesis of Monodispersed Red Emitting LiAl5O8: Fe3+ Nanophosphors,” Sci. Adv. Mater. 4(5–6), 597–603 (2012).
[Crossref]

M. Sivakumar, S. Kanagesan, R. Suresh Babu, S. Jesurani, R. Velmurugan, C. Thirupathi, and T. Kalaivani, “Synthesis of CoFe2O4 powder via PVA assisted sol–gel process,” J. Mater. Sci. Mater. Electron. 23(5), 1045–1049 (2012).
[Crossref]

2011 (3)

I. Veljković, D. Poleti, L. J. Karanović, M. Zdujić, and G. Branković, “Solid state synthesis of extra phase-pure Li4Ti5O12 spinel,” Sci. Sinter. 43(3), 343–351 (2011).
[Crossref]

S. S. Pitale, V. Kumar, I. Nagpure, O. M. Ntwaeaborwa, and H. C. Swart, “Luminescence investigations on LiAl5O8:Tb3+ nanocrystalline phosphors,” Curr. Appl. Phys. 11(3), 341–345 (2011).
[Crossref]

S. S. Pitale, V. Kumar, I. M. Nagpure, O. M. Ntwaeaborwa, E. Coetsee, and H. C. Swart, “Cathodoluminescent properties and surface characterization of bluish-white LiAl5O8:Tb phosphor,” J. Appl. Phys. 109(1), 013105 (2011).
[Crossref]

2010 (1)

L. C. V. Rodrigues, R. Stefani, H. F. Brito, M. C. F. C. Felinto, J. Hölsä, M. Lastusaari, T. Laamanen, and M. Malkamäki, “Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl2O4:Eu2+, Dy3+,” J. Solid State Chem. 183(10), 2365–2371 (2010).
[Crossref]

2009 (1)

V. Singh, R. P. S. Chakradhar, J. L. Rao, and H. Y. Kwak, “Characterization, EPR and photoluminescence studies of LiAl5O8:Cr phosphors,” Solid State Sci. 11(4), 870–874 (2009).
[Crossref]

2008 (2)

V. Singh, R. P. S. Chakradhar, J. L. Rao, and D. K. Kim, “EPR and luminescence properties of combustion synthesized LiAl5O8:Mn phosphors,” Mater. Chem. Phys. 110(1), 43–51 (2008).
[Crossref]

V. Singh and T. K. Gundu Rao, “Studies of defects in combustion synthesized europium-doped LiAl5O8 red phosphor,” J. Solid State Chem. 181(6), 1387–1392 (2008).
[Crossref]

2007 (3)

D. Wang, Y. Wang, and L. Wang, “Photoluminescence properties of Sr(Y, Gd)2O4:Eu3+ under VUV excitation,” J. Lumin. 126(1), 135–138 (2007).
[Crossref]

R. L. Cavasso-Filho, A. F. Lago, M. G. P. Homem, S. Pilling, and A. N. Brito, “Delivering high-purity vacuum ultraviolet photons at the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 156–158, 168–171 (2007).
[Crossref]

P. Dorenbos, “Absolute location of lanthanide energy levels and the performance of phosphors,” J. Lumin. 122–123, 315–317 (2007).
[Crossref]

2005 (2)

R. L. Cavasso-Filho, M. G. P. Homem, R. Landers, and A. N. Brito, “Advances on the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 144–147, 1125–1127 (2005).
[Crossref]

X. Duan and D. Yuan, “Synthesis and characterization of Co2+-doped lithium aluminum spinel nanocrystals,” J. Non-Cryst. Solids 351(27-29), 2348–2351 (2005).
[Crossref]

2004 (1)

P. Dorenbos, “Locating lanthanide impurity levels in the forbidden band of host crystals,” J. Lumin. 108(1–4), 301–305 (2004).
[Crossref]

2003 (1)

P. Dorenbos, “Systematic behaviour in trivalent lanthanide charge transfer energies,” J. Phys. Condens. Matter 15(49), 8417–8434 (2003).
[Crossref]

2002 (1)

L. van Pieterson, M. F. Reid, R. T. Wegh, S. Soverna, and A. Meijerink, “4fn→ 4fn−1 5d transitions of the light lanthanides: Experiment and theory,” Phys. Rev. B 65(4), 045113 (2002).
[Crossref]

2000 (1)

P. Dorenbos, “The 5d level positions of the trivalent lanthanides in inorganic compounds,” J. Lumin. 91(3-4), 155–176 (2000).
[Crossref]

1998 (1)

T. R. N. Kutty and M. Nayak, “Cationic distribution and its influence on the luminescent properties of Fe3+-doped LiAl5O8 prepared by wet chemical methods,” J. Alloys Compd. 269(1-2), 75–87 (1998).
[Crossref]

1997 (2)

O. A. Lopez, J. McKittrick, and L. E. Shea, “Fluorescence properties of polycrystalline Tm3+-activated Y3Al5O12 and Tm3+-Li+ co-activated Y3Al5O12 in the visible and near IR ranges,” J. Lumin. 71(1), 1–11 (1997).
[Crossref]

R. T. Wegh, H. Donker, A. Meijerink, R. J. Lamminmäki, and J. Hölsä, “Vacuum-ultraviolet spectroscopy and quantum cutting for Gd3+ in LiYF4,” Phys. Rev. B 56(21), 13841–13848 (1997).
[Crossref]

1995 (1)

S. Emura, H. Maeda, and M. Nomura, “Variation of optical luminescence X-ray excitation spectra,” Phys. B Condens. Matter. 208–209, 108–110 (1995).

1994 (1)

P. G. Radaelli, J. D. Jorgensen, A. J. Schultz, J. L. Peng, and R. L. Greene, “Evidence of apical oxygen in Nd2CuOy determined by single-crystal neutron diffraction,” Phys. Rev. B Condens. Matter 49(21), 15322–15326 (1994).
[Crossref] [PubMed]

1988 (1)

T. Abritta and F. S. Barros, “Luminescence and photoacoustic measurements of LiAl5O8: Fe3+,” J. Lumin. 40–41, 187–188 (1988).
[Crossref]

1987 (1)

P. Strobel, J. J. Capponi, C. Chaillout, M. Marezio, and J. L. Tholence, “Variations of stoichiometry and cell symmetry in YBa2Cu3O7− x with temperature and oxygen pressure,” Nature 327(6120), 306–308 (1987).
[Crossref]

1986 (1)

S. C. Bhargava, “Spin-lattice relaxation of Fe3+ ions in LiAl5O8,” J. Phys. C Solid State Phys. 19(35), 7045–7070 (1986).
[Crossref]

1979 (2)

H. L. Yakel, “A refinement of the crystal structure of monoclinic europium sesquioxide,” Acta Crystallogr. B 35(3), 564–569 (1979).
[Crossref]

R. Famery, F. Queyroux, J.-C. Gilles, and P. Herpin, “Etude structurale de la forme ordonnée de LiAl5O8,” J. Solid State Chem. 30(2), 257–263 (1979).
[Crossref]

1976 (1)

R. D. Shannon, “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,” Acta Crystallogr. A 32(5), 751–767 (1976).
[Crossref]

Abritta, T.

T. Abritta and F. S. Barros, “Luminescence and photoacoustic measurements of LiAl5O8: Fe3+,” J. Lumin. 40–41, 187–188 (1988).
[Crossref]

Al Orainy, R. H.

O. Kaygili, S. Keser, R. H. Al Orainy, T. Ates, and F. Yakuphanoglu, “In vitro characterization of polyvinyl alcohol assisted hydroxyapatite derived by sol-gel method,” Mater. Sci. Eng. C 35, 239–244 (2014).
[Crossref] [PubMed]

Amol Pawar, U.

A. P. Jadhav, U. Amol Pawar, B.K. Pal, Kim, and Y.S. Kang, “Synthesis of Monodispersed Red Emitting LiAl5O8: Fe3+ Nanophosphors,” Sci. Adv. Mater. 4(5–6), 597–603 (2012).
[Crossref]

Ates, T.

O. Kaygili, S. Keser, R. H. Al Orainy, T. Ates, and F. Yakuphanoglu, “In vitro characterization of polyvinyl alcohol assisted hydroxyapatite derived by sol-gel method,” Mater. Sci. Eng. C 35, 239–244 (2014).
[Crossref] [PubMed]

Barros, F. S.

T. Abritta and F. S. Barros, “Luminescence and photoacoustic measurements of LiAl5O8: Fe3+,” J. Lumin. 40–41, 187–188 (1988).
[Crossref]

Bhargava, S. C.

S. C. Bhargava, “Spin-lattice relaxation of Fe3+ ions in LiAl5O8,” J. Phys. C Solid State Phys. 19(35), 7045–7070 (1986).
[Crossref]

Brankovic, G.

I. Veljković, D. Poleti, L. J. Karanović, M. Zdujić, and G. Branković, “Solid state synthesis of extra phase-pure Li4Ti5O12 spinel,” Sci. Sinter. 43(3), 343–351 (2011).
[Crossref]

Brito, A. N.

R. L. Cavasso-Filho, A. F. Lago, M. G. P. Homem, S. Pilling, and A. N. Brito, “Delivering high-purity vacuum ultraviolet photons at the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 156–158, 168–171 (2007).
[Crossref]

R. L. Cavasso-Filho, M. G. P. Homem, R. Landers, and A. N. Brito, “Advances on the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 144–147, 1125–1127 (2005).
[Crossref]

Brito, H. F.

L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
[Crossref]

L. C. V. Rodrigues, R. Stefani, H. F. Brito, M. C. F. C. Felinto, J. Hölsä, M. Lastusaari, T. Laamanen, and M. Malkamäki, “Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl2O4:Eu2+, Dy3+,” J. Solid State Chem. 183(10), 2365–2371 (2010).
[Crossref]

Capponi, J. J.

P. Strobel, J. J. Capponi, C. Chaillout, M. Marezio, and J. L. Tholence, “Variations of stoichiometry and cell symmetry in YBa2Cu3O7− x with temperature and oxygen pressure,” Nature 327(6120), 306–308 (1987).
[Crossref]

Cavasso-Filho, R. L.

R. L. Cavasso-Filho, A. F. Lago, M. G. P. Homem, S. Pilling, and A. N. Brito, “Delivering high-purity vacuum ultraviolet photons at the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 156–158, 168–171 (2007).
[Crossref]

R. L. Cavasso-Filho, M. G. P. Homem, R. Landers, and A. N. Brito, “Advances on the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 144–147, 1125–1127 (2005).
[Crossref]

Chaillout, C.

P. Strobel, J. J. Capponi, C. Chaillout, M. Marezio, and J. L. Tholence, “Variations of stoichiometry and cell symmetry in YBa2Cu3O7− x with temperature and oxygen pressure,” Nature 327(6120), 306–308 (1987).
[Crossref]

Chakradhar, R. P. S.

V. Singh, R. P. S. Chakradhar, J. L. Rao, and H. Y. Kwak, “Characterization, EPR and photoluminescence studies of LiAl5O8:Cr phosphors,” Solid State Sci. 11(4), 870–874 (2009).
[Crossref]

V. Singh, R. P. S. Chakradhar, J. L. Rao, and D. K. Kim, “EPR and luminescence properties of combustion synthesized LiAl5O8:Mn phosphors,” Mater. Chem. Phys. 110(1), 43–51 (2008).
[Crossref]

Chawla, S.

V. Kumar, A. F. Khan, and S. Chawla, “Intense red-emitting multi-rare-earth doped nanoparticles of YVO4 for spectrum conversion towards improved energy harvesting by solar cells,” J. Phys. D Appl. Phys. 46(36), 365101 (2013).
[Crossref]

Coetsee, E.

S. S. Pitale, V. Kumar, I. M. Nagpure, O. M. Ntwaeaborwa, E. Coetsee, and H. C. Swart, “Cathodoluminescent properties and surface characterization of bluish-white LiAl5O8:Tb phosphor,” J. Appl. Phys. 109(1), 013105 (2011).
[Crossref]

Donker, H.

R. T. Wegh, H. Donker, A. Meijerink, R. J. Lamminmäki, and J. Hölsä, “Vacuum-ultraviolet spectroscopy and quantum cutting for Gd3+ in LiYF4,” Phys. Rev. B 56(21), 13841–13848 (1997).
[Crossref]

Dorenbos, P.

P. Dorenbos, “Absolute location of lanthanide energy levels and the performance of phosphors,” J. Lumin. 122–123, 315–317 (2007).
[Crossref]

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R. L. Cavasso-Filho, A. F. Lago, M. G. P. Homem, S. Pilling, and A. N. Brito, “Delivering high-purity vacuum ultraviolet photons at the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 156–158, 168–171 (2007).
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Jadhav, A. P.

A. P. Jadhav, U. Amol Pawar, B.K. Pal, Kim, and Y.S. Kang, “Synthesis of Monodispersed Red Emitting LiAl5O8: Fe3+ Nanophosphors,” Sci. Adv. Mater. 4(5–6), 597–603 (2012).
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Jia, X.

Q. Du, G. Zhou, J. Zhou, X. Jia, and H. Zhou, “Enhanced luminescence of novel Y2Zr2O7:Dy3+ phosphors by Li+ co-doping,” J. Alloys Compd. 552, 152–156 (2013).
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D. Dutczak, T. Jüstel, C. Ronda, and A. Meijerink, “Eu(2+) luminescence in strontium aluminates,” Phys. Chem. Chem. Phys. 17(23), 15236–15249 (2015).
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M. Sivakumar, S. Kanagesan, R. Suresh Babu, S. Jesurani, R. Velmurugan, C. Thirupathi, and T. Kalaivani, “Synthesis of CoFe2O4 powder via PVA assisted sol–gel process,” J. Mater. Sci. Mater. Electron. 23(5), 1045–1049 (2012).
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A. P. Jadhav, U. Amol Pawar, B.K. Pal, Kim, and Y.S. Kang, “Synthesis of Monodispersed Red Emitting LiAl5O8: Fe3+ Nanophosphors,” Sci. Adv. Mater. 4(5–6), 597–603 (2012).
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A. P. Jadhav, U. Amol Pawar, B.K. Pal, Kim, and Y.S. Kang, “Synthesis of Monodispersed Red Emitting LiAl5O8: Fe3+ Nanophosphors,” Sci. Adv. Mater. 4(5–6), 597–603 (2012).
[Crossref]

Kim, D. K.

V. Singh, R. P. S. Chakradhar, J. L. Rao, and D. K. Kim, “EPR and luminescence properties of combustion synthesized LiAl5O8:Mn phosphors,” Mater. Chem. Phys. 110(1), 43–51 (2008).
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Kumar, V.

V. Kumar, A. F. Khan, and S. Chawla, “Intense red-emitting multi-rare-earth doped nanoparticles of YVO4 for spectrum conversion towards improved energy harvesting by solar cells,” J. Phys. D Appl. Phys. 46(36), 365101 (2013).
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[Crossref]

S. S. Pitale, V. Kumar, I. Nagpure, O. M. Ntwaeaborwa, and H. C. Swart, “Luminescence investigations on LiAl5O8:Tb3+ nanocrystalline phosphors,” Curr. Appl. Phys. 11(3), 341–345 (2011).
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T. R. N. Kutty and M. Nayak, “Cationic distribution and its influence on the luminescent properties of Fe3+-doped LiAl5O8 prepared by wet chemical methods,” J. Alloys Compd. 269(1-2), 75–87 (1998).
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V. Singh, R. P. S. Chakradhar, J. L. Rao, and H. Y. Kwak, “Characterization, EPR and photoluminescence studies of LiAl5O8:Cr phosphors,” Solid State Sci. 11(4), 870–874 (2009).
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R. L. Cavasso-Filho, A. F. Lago, M. G. P. Homem, S. Pilling, and A. N. Brito, “Delivering high-purity vacuum ultraviolet photons at the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 156–158, 168–171 (2007).
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[Crossref]

Landers, R.

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[Crossref]

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L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
[Crossref]

L. C. V. Rodrigues, R. Stefani, H. F. Brito, M. C. F. C. Felinto, J. Hölsä, M. Lastusaari, T. Laamanen, and M. Malkamäki, “Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl2O4:Eu2+, Dy3+,” J. Solid State Chem. 183(10), 2365–2371 (2010).
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S. Emura, H. Maeda, and M. Nomura, “Variation of optical luminescence X-ray excitation spectra,” Phys. B Condens. Matter. 208–209, 108–110 (1995).

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L. C. V. Rodrigues, R. Stefani, H. F. Brito, M. C. F. C. Felinto, J. Hölsä, M. Lastusaari, T. Laamanen, and M. Malkamäki, “Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl2O4:Eu2+, Dy3+,” J. Solid State Chem. 183(10), 2365–2371 (2010).
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L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
[Crossref]

Matos, J. R.

L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
[Crossref]

McKittrick, J.

O. A. Lopez, J. McKittrick, and L. E. Shea, “Fluorescence properties of polycrystalline Tm3+-activated Y3Al5O12 and Tm3+-Li+ co-activated Y3Al5O12 in the visible and near IR ranges,” J. Lumin. 71(1), 1–11 (1997).
[Crossref]

Meijerink, A.

D. Dutczak, T. Jüstel, C. Ronda, and A. Meijerink, “Eu(2+) luminescence in strontium aluminates,” Phys. Chem. Chem. Phys. 17(23), 15236–15249 (2015).
[Crossref] [PubMed]

L. van Pieterson, M. F. Reid, R. T. Wegh, S. Soverna, and A. Meijerink, “4fn→ 4fn−1 5d transitions of the light lanthanides: Experiment and theory,” Phys. Rev. B 65(4), 045113 (2002).
[Crossref]

R. T. Wegh, H. Donker, A. Meijerink, R. J. Lamminmäki, and J. Hölsä, “Vacuum-ultraviolet spectroscopy and quantum cutting for Gd3+ in LiYF4,” Phys. Rev. B 56(21), 13841–13848 (1997).
[Crossref]

Nagpure, I.

S. S. Pitale, V. Kumar, I. Nagpure, O. M. Ntwaeaborwa, and H. C. Swart, “Luminescence investigations on LiAl5O8:Tb3+ nanocrystalline phosphors,” Curr. Appl. Phys. 11(3), 341–345 (2011).
[Crossref]

Nagpure, I. M.

S. S. Pitale, V. Kumar, I. M. Nagpure, O. M. Ntwaeaborwa, E. Coetsee, and H. C. Swart, “Cathodoluminescent properties and surface characterization of bluish-white LiAl5O8:Tb phosphor,” J. Appl. Phys. 109(1), 013105 (2011).
[Crossref]

Nagpure, P. A.

J. T. Ingle, A. B. Gawande, R. P. Sonekar, P. A. Nagpure, and S. K. Omanwar, “Synthesis and photoluminescence of inorganic borate host red emitting VUV phosphor YCaBO4:Eu3+,” AIP Conf. Proc. 1536, 895–896 (2013).
[Crossref]

Nayak, M.

T. R. N. Kutty and M. Nayak, “Cationic distribution and its influence on the luminescent properties of Fe3+-doped LiAl5O8 prepared by wet chemical methods,” J. Alloys Compd. 269(1-2), 75–87 (1998).
[Crossref]

Nomura, M.

S. Emura, H. Maeda, and M. Nomura, “Variation of optical luminescence X-ray excitation spectra,” Phys. B Condens. Matter. 208–209, 108–110 (1995).

Ntwaeaborwa, O. M.

S. S. Pitale, V. Kumar, I. Nagpure, O. M. Ntwaeaborwa, and H. C. Swart, “Luminescence investigations on LiAl5O8:Tb3+ nanocrystalline phosphors,” Curr. Appl. Phys. 11(3), 341–345 (2011).
[Crossref]

S. S. Pitale, V. Kumar, I. M. Nagpure, O. M. Ntwaeaborwa, E. Coetsee, and H. C. Swart, “Cathodoluminescent properties and surface characterization of bluish-white LiAl5O8:Tb phosphor,” J. Appl. Phys. 109(1), 013105 (2011).
[Crossref]

Omanwar, S. K.

J. T. Ingle, A. B. Gawande, R. P. Sonekar, P. A. Nagpure, and S. K. Omanwar, “Synthesis and photoluminescence of inorganic borate host red emitting VUV phosphor YCaBO4:Eu3+,” AIP Conf. Proc. 1536, 895–896 (2013).
[Crossref]

Pal, B.K.

A. P. Jadhav, U. Amol Pawar, B.K. Pal, Kim, and Y.S. Kang, “Synthesis of Monodispersed Red Emitting LiAl5O8: Fe3+ Nanophosphors,” Sci. Adv. Mater. 4(5–6), 597–603 (2012).
[Crossref]

Pandey, A. C.

P. K. Sharma, R. K. Dutta, and A. C. Pandey, “Performance of YAG:Eu3+, YAG:Tb3+ and BAM:Eu2+ plasma display nanophosphors,” J. Nanopart. Res. 14(3), 731 (2012).
[Crossref]

Paturi, P.

L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
[Crossref]

Peng, J. L.

P. G. Radaelli, J. D. Jorgensen, A. J. Schultz, J. L. Peng, and R. L. Greene, “Evidence of apical oxygen in Nd2CuOy determined by single-crystal neutron diffraction,” Phys. Rev. B Condens. Matter 49(21), 15322–15326 (1994).
[Crossref] [PubMed]

Pilling, S.

R. L. Cavasso-Filho, A. F. Lago, M. G. P. Homem, S. Pilling, and A. N. Brito, “Delivering high-purity vacuum ultraviolet photons at the Brazilian toroidal grating monochromator (TGM) beamline,” J. Electron Spectrosc. Relat. Phenom. 156–158, 168–171 (2007).
[Crossref]

Pitale, S. S.

S. S. Pitale, V. Kumar, I. M. Nagpure, O. M. Ntwaeaborwa, E. Coetsee, and H. C. Swart, “Cathodoluminescent properties and surface characterization of bluish-white LiAl5O8:Tb phosphor,” J. Appl. Phys. 109(1), 013105 (2011).
[Crossref]

S. S. Pitale, V. Kumar, I. Nagpure, O. M. Ntwaeaborwa, and H. C. Swart, “Luminescence investigations on LiAl5O8:Tb3+ nanocrystalline phosphors,” Curr. Appl. Phys. 11(3), 341–345 (2011).
[Crossref]

Poleti, D.

I. Veljković, D. Poleti, L. J. Karanović, M. Zdujić, and G. Branković, “Solid state synthesis of extra phase-pure Li4Ti5O12 spinel,” Sci. Sinter. 43(3), 343–351 (2011).
[Crossref]

Queyroux, F.

R. Famery, F. Queyroux, J.-C. Gilles, and P. Herpin, “Etude structurale de la forme ordonnée de LiAl5O8,” J. Solid State Chem. 30(2), 257–263 (1979).
[Crossref]

Radaelli, P. G.

P. G. Radaelli, J. D. Jorgensen, A. J. Schultz, J. L. Peng, and R. L. Greene, “Evidence of apical oxygen in Nd2CuOy determined by single-crystal neutron diffraction,” Phys. Rev. B Condens. Matter 49(21), 15322–15326 (1994).
[Crossref] [PubMed]

Rao, J. L.

V. Singh, R. P. S. Chakradhar, J. L. Rao, and H. Y. Kwak, “Characterization, EPR and photoluminescence studies of LiAl5O8:Cr phosphors,” Solid State Sci. 11(4), 870–874 (2009).
[Crossref]

V. Singh, R. P. S. Chakradhar, J. L. Rao, and D. K. Kim, “EPR and luminescence properties of combustion synthesized LiAl5O8:Mn phosphors,” Mater. Chem. Phys. 110(1), 43–51 (2008).
[Crossref]

Reid, M. F.

L. van Pieterson, M. F. Reid, R. T. Wegh, S. Soverna, and A. Meijerink, “4fn→ 4fn−1 5d transitions of the light lanthanides: Experiment and theory,” Phys. Rev. B 65(4), 045113 (2002).
[Crossref]

Rodrigues, L. C. V.

L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
[Crossref]

L. C. V. Rodrigues, R. Stefani, H. F. Brito, M. C. F. C. Felinto, J. Hölsä, M. Lastusaari, T. Laamanen, and M. Malkamäki, “Thermoluminescence and synchrotron radiation studies on the persistent luminescence of BaAl2O4:Eu2+, Dy3+,” J. Solid State Chem. 183(10), 2365–2371 (2010).
[Crossref]

Rodrigues, R. V.

L. C. V. Rodrigues, J. Hölsä, H. F. Brito, M. Maryško, J. R. Matos, P. Paturi, R. V. Rodrigues, and M. Lastusaari, “Magneto-optical studies of valence instability in europium and terbium phosphors,” J. Lumin. 170, 701–706 (2016).
[Crossref]

Ronda, C.

D. Dutczak, T. Jüstel, C. Ronda, and A. Meijerink, “Eu(2+) luminescence in strontium aluminates,” Phys. Chem. Chem. Phys. 17(23), 15236–15249 (2015).
[Crossref] [PubMed]

Schultz, A. J.

P. G. Radaelli, J. D. Jorgensen, A. J. Schultz, J. L. Peng, and R. L. Greene, “Evidence of apical oxygen in Nd2CuOy determined by single-crystal neutron diffraction,” Phys. Rev. B Condens. Matter 49(21), 15322–15326 (1994).
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P. K. Sharma, R. K. Dutta, and A. C. Pandey, “Performance of YAG:Eu3+, YAG:Tb3+ and BAM:Eu2+ plasma display nanophosphors,” J. Nanopart. Res. 14(3), 731 (2012).
[Crossref]

Shea, L. E.

O. A. Lopez, J. McKittrick, and L. E. Shea, “Fluorescence properties of polycrystalline Tm3+-activated Y3Al5O12 and Tm3+-Li+ co-activated Y3Al5O12 in the visible and near IR ranges,” J. Lumin. 71(1), 1–11 (1997).
[Crossref]

Singh, V.

V. Singh, R. P. S. Chakradhar, J. L. Rao, and H. Y. Kwak, “Characterization, EPR and photoluminescence studies of LiAl5O8:Cr phosphors,” Solid State Sci. 11(4), 870–874 (2009).
[Crossref]

V. Singh, R. P. S. Chakradhar, J. L. Rao, and D. K. Kim, “EPR and luminescence properties of combustion synthesized LiAl5O8:Mn phosphors,” Mater. Chem. Phys. 110(1), 43–51 (2008).
[Crossref]

V. Singh and T. K. Gundu Rao, “Studies of defects in combustion synthesized europium-doped LiAl5O8 red phosphor,” J. Solid State Chem. 181(6), 1387–1392 (2008).
[Crossref]

Sivakumar, M.

M. Sivakumar, S. Kanagesan, R. Suresh Babu, S. Jesurani, R. Velmurugan, C. Thirupathi, and T. Kalaivani, “Synthesis of CoFe2O4 powder via PVA assisted sol–gel process,” J. Mater. Sci. Mater. Electron. 23(5), 1045–1049 (2012).
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[Crossref]

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I. Veljković, D. Poleti, L. J. Karanović, M. Zdujić, and G. Branković, “Solid state synthesis of extra phase-pure Li4Ti5O12 spinel,” Sci. Sinter. 43(3), 343–351 (2011).
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Figures (5)

Fig. 1
Fig. 1 XRD patterns of the Li1+xAl5O8:Eu (x = 0 and 0.05) materials compared to the standard structure proposed by Famery et al., (1979) [26].
Fig. 2
Fig. 2 Excitation spectra for LiAl5O8:Eu total luminescence yield scanned at the VUV range.
Fig. 3
Fig. 3 PL excitation spectra of LiAl5O8:Eu, calcined at 1000°C, monitoring the Eu2+ (441 nm) (green curve) and Eu3+ (613 nm) (red curve) emission wavelength.
Fig. 4
Fig. 4 PL emission spectra of LiAl5O8:Eu and Li1.05Al5O8:Eu samples excited at 191 nm (left) and 146 nm (right). All spectra were normalized to the Eu3+ 5D07F2 transition intensity.
Fig. 5
Fig. 5 Total XEOL yield and excitation spectra (left) and XEOL emission spectra (right) of LiAl5O8:Eu and Li1.05Al5O8:Eu samples.

Equations (3)

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Li Li × Eu Li + O i ' '
2O i ' ' O 2 (g) + 4e '
Eu Li + e ' Eu Li

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