Abstract

Enhanced luminescent SiO2@LaPO4:Ce3+/Tb3+ phosphors were prepared using a homogeneous precipitation method followed by a subsequent heat-treatment process. The products were characterized by XRD, SEM, TEM, HRTEM, XPS, and photoluminescence (PL).The XRD results demonstrated that all of the diffraction peaks can be well indexed to the pure monoclinic phase. The SEM and TEM images indicated that the phosphors have perfect spherical shapes with a narrow size distribution and no agglomeration. The EDS and XPS analysis revealed that LaPO4:Ce3+/Tb3+ layers have been deposited successfully on SiO2 particles. The PL results demonstrated the samples annealed at 800 °C have the strongest green emission.

© 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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  1. R. Ghosh Chaudhuri and S. Paria, “Core/shell nanoparticles: classes, properties, synthesis mechanisms, characterization, and applications,” Chem. Rev. 112(4), 2373–2433 (2012).
    [PubMed]
  2. S. A. M. Ali, M. Anwar, A. M. Abdalla, M. R. Somalu, and A. Muchtar, “Ce0.80Sm0.10Ba0.05Er0.05O2-δ multi-doped ceria electrolyte for intermediate temperature solid oxide fuel cells,” Ceram. Int. 43(1), 1265–1271 (2017).
  3. Y. Hikichi and T. J. Nomura, “Melting temperatures of monazite and xenotime,” J. Am. Ceram. Soc. 70, C252–C253 (1987).
  4. F. H. Firsching and S. N. J. Brune, “Solubility products of the trivalent rare-earth phosphates,” J. Chem. Eng. Data 36, 93–95 (1991).
  5. P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).
  6. F. Angiuli, E. Cavalli, and A. Belletti, “Synthesis and spectroscopic characterization of YPO4 activated with Tb3+ and effect of Bi3+ co-doping on the luminescence properties,” J. Sol. St. Chem. 192, 289–295 (2012).
  7. M. Yu, J. Lin, and J. Fang, “Silica spheres coated with YVO4:Eu3+ layers via sol-gel process a simple method to obtain spherical core-shell phosphors,” Chem. Mater. 17, 1783–1791 (2005).
  8. S. Gai, C. Li, P. Yang, and J. Lin, “Recent progress in rare earth micro/nanocrystals: soft chemical synthesis, luminescent properties, and biomedical applications,” Chem. Rev. 114(4), 2343–2389 (2014).
    [PubMed]
  9. M. Yu, H. Wang, C. K. Lin, G. Z. Li, and J. Lin, “Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4:Ce3+/Tb3+ particles with a core-shell structure,” Nanotechnology 17, 3245–3252 (2006).
  10. S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
    [PubMed]
  11. J. Li, Z. Yang, Z. Chai, J. Qiu, and Z. Song, “Preparation and upconversion emission enhancement of SiO2 coated YbPO4: Er3+ inverse opals with Ag nanoparticles,” Opt. Mater. Express 7(10), 3503–3516 (2017).
  12. Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).
  13. J. Esquena, R. Pons, N. Azemar, J. Caelles, and C. Solans, “Preparation of monodisperse silica particles in emulsion media,” Colloids Surf. A Physicochem. Eng. Asp. 123–124, 575–586 (1997).
  14. K. S. Rao, K. El-Hami, T. Kodaki, K. Matsushige, and K. Makino, “A novel method for synthesis of silica nanoparticles,” J. Colloid Interface Sci. 289(1), 125–131 (2005).
    [PubMed]
  15. Z. Fu and W. Bu, “High efficiency green-luminescent LaPO4: Ce, Tb hierarchical nanostructures: Synthesis, characterization, and luminescence properties,” Solid State Sci. 10(8), 1062–1067 (2008).
  16. J. Lin, M. Yu, C. Lin, and X. Liu, “Multiform oxide optical materials via the versatile pechini-type sol-gel process: synthesis and characteristics,” J. Phys. Chem. C 111(16), 5835–5845 (2007).
  17. J. Dai, M. Lv, G. Li, and X. Li, “Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core-shell phosphors,” Mater. Des. 83, 795–800 (2015).
  18. P. Ghosh, A. Kar, and A. Patra, “Energy transfer study between Ce3+ and Tb3+ ions in doped and core-shell sodium yttrium fluoride nanocrystals,” Nanoscale 2(7), 1196–1202 (2010).
    [PubMed]

2017 (2)

S. A. M. Ali, M. Anwar, A. M. Abdalla, M. R. Somalu, and A. Muchtar, “Ce0.80Sm0.10Ba0.05Er0.05O2-δ multi-doped ceria electrolyte for intermediate temperature solid oxide fuel cells,” Ceram. Int. 43(1), 1265–1271 (2017).

J. Li, Z. Yang, Z. Chai, J. Qiu, and Z. Song, “Preparation and upconversion emission enhancement of SiO2 coated YbPO4: Er3+ inverse opals with Ag nanoparticles,” Opt. Mater. Express 7(10), 3503–3516 (2017).

2016 (1)

Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).

2015 (1)

J. Dai, M. Lv, G. Li, and X. Li, “Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core-shell phosphors,” Mater. Des. 83, 795–800 (2015).

2014 (1)

S. Gai, C. Li, P. Yang, and J. Lin, “Recent progress in rare earth micro/nanocrystals: soft chemical synthesis, luminescent properties, and biomedical applications,” Chem. Rev. 114(4), 2343–2389 (2014).
[PubMed]

2012 (2)

F. Angiuli, E. Cavalli, and A. Belletti, “Synthesis and spectroscopic characterization of YPO4 activated with Tb3+ and effect of Bi3+ co-doping on the luminescence properties,” J. Sol. St. Chem. 192, 289–295 (2012).

R. Ghosh Chaudhuri and S. Paria, “Core/shell nanoparticles: classes, properties, synthesis mechanisms, characterization, and applications,” Chem. Rev. 112(4), 2373–2433 (2012).
[PubMed]

2011 (1)

S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
[PubMed]

2010 (1)

P. Ghosh, A. Kar, and A. Patra, “Energy transfer study between Ce3+ and Tb3+ ions in doped and core-shell sodium yttrium fluoride nanocrystals,” Nanoscale 2(7), 1196–1202 (2010).
[PubMed]

2008 (2)

Z. Fu and W. Bu, “High efficiency green-luminescent LaPO4: Ce, Tb hierarchical nanostructures: Synthesis, characterization, and luminescence properties,” Solid State Sci. 10(8), 1062–1067 (2008).

P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).

2007 (1)

J. Lin, M. Yu, C. Lin, and X. Liu, “Multiform oxide optical materials via the versatile pechini-type sol-gel process: synthesis and characteristics,” J. Phys. Chem. C 111(16), 5835–5845 (2007).

2006 (1)

M. Yu, H. Wang, C. K. Lin, G. Z. Li, and J. Lin, “Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4:Ce3+/Tb3+ particles with a core-shell structure,” Nanotechnology 17, 3245–3252 (2006).

2005 (2)

M. Yu, J. Lin, and J. Fang, “Silica spheres coated with YVO4:Eu3+ layers via sol-gel process a simple method to obtain spherical core-shell phosphors,” Chem. Mater. 17, 1783–1791 (2005).

K. S. Rao, K. El-Hami, T. Kodaki, K. Matsushige, and K. Makino, “A novel method for synthesis of silica nanoparticles,” J. Colloid Interface Sci. 289(1), 125–131 (2005).
[PubMed]

1997 (1)

J. Esquena, R. Pons, N. Azemar, J. Caelles, and C. Solans, “Preparation of monodisperse silica particles in emulsion media,” Colloids Surf. A Physicochem. Eng. Asp. 123–124, 575–586 (1997).

1991 (1)

F. H. Firsching and S. N. J. Brune, “Solubility products of the trivalent rare-earth phosphates,” J. Chem. Eng. Data 36, 93–95 (1991).

1987 (1)

Y. Hikichi and T. J. Nomura, “Melting temperatures of monazite and xenotime,” J. Am. Ceram. Soc. 70, C252–C253 (1987).

Abdalla, A. M.

S. A. M. Ali, M. Anwar, A. M. Abdalla, M. R. Somalu, and A. Muchtar, “Ce0.80Sm0.10Ba0.05Er0.05O2-δ multi-doped ceria electrolyte for intermediate temperature solid oxide fuel cells,” Ceram. Int. 43(1), 1265–1271 (2017).

Ali, S. A. M.

S. A. M. Ali, M. Anwar, A. M. Abdalla, M. R. Somalu, and A. Muchtar, “Ce0.80Sm0.10Ba0.05Er0.05O2-δ multi-doped ceria electrolyte for intermediate temperature solid oxide fuel cells,” Ceram. Int. 43(1), 1265–1271 (2017).

Angiuli, F.

F. Angiuli, E. Cavalli, and A. Belletti, “Synthesis and spectroscopic characterization of YPO4 activated with Tb3+ and effect of Bi3+ co-doping on the luminescence properties,” J. Sol. St. Chem. 192, 289–295 (2012).

Anwar, M.

S. A. M. Ali, M. Anwar, A. M. Abdalla, M. R. Somalu, and A. Muchtar, “Ce0.80Sm0.10Ba0.05Er0.05O2-δ multi-doped ceria electrolyte for intermediate temperature solid oxide fuel cells,” Ceram. Int. 43(1), 1265–1271 (2017).

Azemar, N.

J. Esquena, R. Pons, N. Azemar, J. Caelles, and C. Solans, “Preparation of monodisperse silica particles in emulsion media,” Colloids Surf. A Physicochem. Eng. Asp. 123–124, 575–586 (1997).

Belletti, A.

F. Angiuli, E. Cavalli, and A. Belletti, “Synthesis and spectroscopic characterization of YPO4 activated with Tb3+ and effect of Bi3+ co-doping on the luminescence properties,” J. Sol. St. Chem. 192, 289–295 (2012).

Brune, S. N. J.

F. H. Firsching and S. N. J. Brune, “Solubility products of the trivalent rare-earth phosphates,” J. Chem. Eng. Data 36, 93–95 (1991).

Bu, W.

Z. Fu and W. Bu, “High efficiency green-luminescent LaPO4: Ce, Tb hierarchical nanostructures: Synthesis, characterization, and luminescence properties,” Solid State Sci. 10(8), 1062–1067 (2008).

Caelles, J.

J. Esquena, R. Pons, N. Azemar, J. Caelles, and C. Solans, “Preparation of monodisperse silica particles in emulsion media,” Colloids Surf. A Physicochem. Eng. Asp. 123–124, 575–586 (1997).

Cavalli, E.

F. Angiuli, E. Cavalli, and A. Belletti, “Synthesis and spectroscopic characterization of YPO4 activated with Tb3+ and effect of Bi3+ co-doping on the luminescence properties,” J. Sol. St. Chem. 192, 289–295 (2012).

Chai, Z.

Dai, J.

J. Dai, M. Lv, G. Li, and X. Li, “Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core-shell phosphors,” Mater. Des. 83, 795–800 (2015).

Dembski, S.

S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
[PubMed]

Dyrba, M.

S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
[PubMed]

El-Hami, K.

K. S. Rao, K. El-Hami, T. Kodaki, K. Matsushige, and K. Makino, “A novel method for synthesis of silica nanoparticles,” J. Colloid Interface Sci. 289(1), 125–131 (2005).
[PubMed]

Esquena, J.

J. Esquena, R. Pons, N. Azemar, J. Caelles, and C. Solans, “Preparation of monodisperse silica particles in emulsion media,” Colloids Surf. A Physicochem. Eng. Asp. 123–124, 575–586 (1997).

Fang, J.

M. Yu, J. Lin, and J. Fang, “Silica spheres coated with YVO4:Eu3+ layers via sol-gel process a simple method to obtain spherical core-shell phosphors,” Chem. Mater. 17, 1783–1791 (2005).

Firsching, F. H.

F. H. Firsching and S. N. J. Brune, “Solubility products of the trivalent rare-earth phosphates,” J. Chem. Eng. Data 36, 93–95 (1991).

French, R. H.

Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).

Fu, Z.

Z. Fu and W. Bu, “High efficiency green-luminescent LaPO4: Ce, Tb hierarchical nanostructures: Synthesis, characterization, and luminescence properties,” Solid State Sci. 10(8), 1062–1067 (2008).

Gai, S.

S. Gai, C. Li, P. Yang, and J. Lin, “Recent progress in rare earth micro/nanocrystals: soft chemical synthesis, luminescent properties, and biomedical applications,” Chem. Rev. 114(4), 2343–2389 (2014).
[PubMed]

Gellermann, C.

S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
[PubMed]

Ghosh, P.

P. Ghosh, A. Kar, and A. Patra, “Energy transfer study between Ce3+ and Tb3+ ions in doped and core-shell sodium yttrium fluoride nanocrystals,” Nanoscale 2(7), 1196–1202 (2010).
[PubMed]

P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).

Ghosh Chaudhuri, R.

R. Ghosh Chaudhuri and S. Paria, “Core/shell nanoparticles: classes, properties, synthesis mechanisms, characterization, and applications,” Chem. Rev. 112(4), 2373–2433 (2012).
[PubMed]

Haldar, K. K.

P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).

Hikichi, Y.

Y. Hikichi and T. J. Nomura, “Melting temperatures of monazite and xenotime,” J. Am. Ceram. Soc. 70, C252–C253 (1987).

Kar, A.

P. Ghosh, A. Kar, and A. Patra, “Energy transfer study between Ce3+ and Tb3+ ions in doped and core-shell sodium yttrium fluoride nanocrystals,” Nanoscale 2(7), 1196–1202 (2010).
[PubMed]

Klockenbring, T.

S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
[PubMed]

Kodaki, T.

K. S. Rao, K. El-Hami, T. Kodaki, K. Matsushige, and K. Makino, “A novel method for synthesis of silica nanoparticles,” J. Colloid Interface Sci. 289(1), 125–131 (2005).
[PubMed]

Li, C.

S. Gai, C. Li, P. Yang, and J. Lin, “Recent progress in rare earth micro/nanocrystals: soft chemical synthesis, luminescent properties, and biomedical applications,” Chem. Rev. 114(4), 2343–2389 (2014).
[PubMed]

Li, G.

J. Dai, M. Lv, G. Li, and X. Li, “Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core-shell phosphors,” Mater. Des. 83, 795–800 (2015).

Li, G. Z.

M. Yu, H. Wang, C. K. Lin, G. Z. Li, and J. Lin, “Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4:Ce3+/Tb3+ particles with a core-shell structure,” Nanotechnology 17, 3245–3252 (2006).

Li, J.

Li, X.

J. Dai, M. Lv, G. Li, and X. Li, “Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core-shell phosphors,” Mater. Des. 83, 795–800 (2015).

Lin, C.

J. Lin, M. Yu, C. Lin, and X. Liu, “Multiform oxide optical materials via the versatile pechini-type sol-gel process: synthesis and characteristics,” J. Phys. Chem. C 111(16), 5835–5845 (2007).

Lin, C. K.

M. Yu, H. Wang, C. K. Lin, G. Z. Li, and J. Lin, “Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4:Ce3+/Tb3+ particles with a core-shell structure,” Nanotechnology 17, 3245–3252 (2006).

Lin, J.

S. Gai, C. Li, P. Yang, and J. Lin, “Recent progress in rare earth micro/nanocrystals: soft chemical synthesis, luminescent properties, and biomedical applications,” Chem. Rev. 114(4), 2343–2389 (2014).
[PubMed]

J. Lin, M. Yu, C. Lin, and X. Liu, “Multiform oxide optical materials via the versatile pechini-type sol-gel process: synthesis and characteristics,” J. Phys. Chem. C 111(16), 5835–5845 (2007).

M. Yu, H. Wang, C. K. Lin, G. Z. Li, and J. Lin, “Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4:Ce3+/Tb3+ particles with a core-shell structure,” Nanotechnology 17, 3245–3252 (2006).

M. Yu, J. Lin, and J. Fang, “Silica spheres coated with YVO4:Eu3+ layers via sol-gel process a simple method to obtain spherical core-shell phosphors,” Chem. Mater. 17, 1783–1791 (2005).

Liu, X.

J. Lin, M. Yu, C. Lin, and X. Liu, “Multiform oxide optical materials via the versatile pechini-type sol-gel process: synthesis and characteristics,” J. Phys. Chem. C 111(16), 5835–5845 (2007).

Lv, M.

J. Dai, M. Lv, G. Li, and X. Li, “Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core-shell phosphors,” Mater. Des. 83, 795–800 (2015).

Makino, K.

K. S. Rao, K. El-Hami, T. Kodaki, K. Matsushige, and K. Makino, “A novel method for synthesis of silica nanoparticles,” J. Colloid Interface Sci. 289(1), 125–131 (2005).
[PubMed]

Matsushige, K.

K. S. Rao, K. El-Hami, T. Kodaki, K. Matsushige, and K. Makino, “A novel method for synthesis of silica nanoparticles,” J. Colloid Interface Sci. 289(1), 125–131 (2005).
[PubMed]

Milde, M.

S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
[PubMed]

Muchtar, A.

S. A. M. Ali, M. Anwar, A. M. Abdalla, M. R. Somalu, and A. Muchtar, “Ce0.80Sm0.10Ba0.05Er0.05O2-δ multi-doped ceria electrolyte for intermediate temperature solid oxide fuel cells,” Ceram. Int. 43(1), 1265–1271 (2017).

Nomura, T. J.

Y. Hikichi and T. J. Nomura, “Melting temperatures of monazite and xenotime,” J. Am. Ceram. Soc. 70, C252–C253 (1987).

Oliva, J.

P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).

Paria, S.

R. Ghosh Chaudhuri and S. Paria, “Core/shell nanoparticles: classes, properties, synthesis mechanisms, characterization, and applications,” Chem. Rev. 112(4), 2373–2433 (2012).
[PubMed]

Patra, A.

P. Ghosh, A. Kar, and A. Patra, “Energy transfer study between Ce3+ and Tb3+ ions in doped and core-shell sodium yttrium fluoride nanocrystals,” Nanoscale 2(7), 1196–1202 (2010).
[PubMed]

P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).

Pons, R.

J. Esquena, R. Pons, N. Azemar, J. Caelles, and C. Solans, “Preparation of monodisperse silica particles in emulsion media,” Colloids Surf. A Physicochem. Eng. Asp. 123–124, 575–586 (1997).

Qiu, J.

J. Li, Z. Yang, Z. Chai, J. Qiu, and Z. Song, “Preparation and upconversion emission enhancement of SiO2 coated YbPO4: Er3+ inverse opals with Ag nanoparticles,” Opt. Mater. Express 7(10), 3503–3516 (2017).

Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).

Rao, K. S.

K. S. Rao, K. El-Hami, T. Kodaki, K. Matsushige, and K. Makino, “A novel method for synthesis of silica nanoparticles,” J. Colloid Interface Sci. 289(1), 125–131 (2005).
[PubMed]

Rosa, E. D. l.

P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).

Schweizer, S.

S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
[PubMed]

Shao, B.

Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).

Solans, C.

J. Esquena, R. Pons, N. Azemar, J. Caelles, and C. Solans, “Preparation of monodisperse silica particles in emulsion media,” Colloids Surf. A Physicochem. Eng. Asp. 123–124, 575–586 (1997).

Solis, D.

P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).

Somalu, M. R.

S. A. M. Ali, M. Anwar, A. M. Abdalla, M. R. Somalu, and A. Muchtar, “Ce0.80Sm0.10Ba0.05Er0.05O2-δ multi-doped ceria electrolyte for intermediate temperature solid oxide fuel cells,” Ceram. Int. 43(1), 1265–1271 (2017).

Song, Z.

Wang, H.

M. Yu, H. Wang, C. K. Lin, G. Z. Li, and J. Lin, “Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4:Ce3+/Tb3+ particles with a core-shell structure,” Nanotechnology 17, 3245–3252 (2006).

Wang, Y.

Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).

Yang, J.

Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).

Yang, P.

S. Gai, C. Li, P. Yang, and J. Lin, “Recent progress in rare earth micro/nanocrystals: soft chemical synthesis, luminescent properties, and biomedical applications,” Chem. Rev. 114(4), 2343–2389 (2014).
[PubMed]

Yang, Z.

Yang, Z. L.

Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).

Yu, M.

J. Lin, M. Yu, C. Lin, and X. Liu, “Multiform oxide optical materials via the versatile pechini-type sol-gel process: synthesis and characteristics,” J. Phys. Chem. C 111(16), 5835–5845 (2007).

M. Yu, H. Wang, C. K. Lin, G. Z. Li, and J. Lin, “Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4:Ce3+/Tb3+ particles with a core-shell structure,” Nanotechnology 17, 3245–3252 (2006).

M. Yu, J. Lin, and J. Fang, “Silica spheres coated with YVO4:Eu3+ layers via sol-gel process a simple method to obtain spherical core-shell phosphors,” Chem. Mater. 17, 1783–1791 (2005).

Ceram. Int. (1)

S. A. M. Ali, M. Anwar, A. M. Abdalla, M. R. Somalu, and A. Muchtar, “Ce0.80Sm0.10Ba0.05Er0.05O2-δ multi-doped ceria electrolyte for intermediate temperature solid oxide fuel cells,” Ceram. Int. 43(1), 1265–1271 (2017).

Chem. Mater. (1)

M. Yu, J. Lin, and J. Fang, “Silica spheres coated with YVO4:Eu3+ layers via sol-gel process a simple method to obtain spherical core-shell phosphors,” Chem. Mater. 17, 1783–1791 (2005).

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J. Am. Chem. Soc. (1)

Z. L. Yang, B. Shao, J. Yang, Y. Wang, J. Qiu, and R. H. French, “Photoluminescence Enhancement of SiO2 coated LaPO4:Eu3+ inverse opals by surface plasmon resonance of Ag nanoparticles,” J. Am. Chem. Soc. 99(10), 3330–3335 (2016).

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J. Phys. Chem. C (2)

J. Lin, M. Yu, C. Lin, and X. Liu, “Multiform oxide optical materials via the versatile pechini-type sol-gel process: synthesis and characteristics,” J. Phys. Chem. C 111(16), 5835–5845 (2007).

P. Ghosh, J. Oliva, E. D. l. Rosa, K. K. Haldar, D. Solis, and A. Patra, “Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods,” J. Phys. Chem. C 112(26), 9650–9658 (2008).

J. Sol. St. Chem. (1)

F. Angiuli, E. Cavalli, and A. Belletti, “Synthesis and spectroscopic characterization of YPO4 activated with Tb3+ and effect of Bi3+ co-doping on the luminescence properties,” J. Sol. St. Chem. 192, 289–295 (2012).

Langmuir (1)

S. Dembski, M. Milde, M. Dyrba, S. Schweizer, C. Gellermann, and T. Klockenbring, “Effect of pH on the synthesis and properties of luminescent SiO2/calcium phosphate:Eu3+ core-shell nanoparticles,” Langmuir 27(23), 14025–14032 (2011).
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Mater. Des. (1)

J. Dai, M. Lv, G. Li, and X. Li, “Synthesis and luminescence properties of highly uniform SiO2@LaPO4:Eu3+ core-shell phosphors,” Mater. Des. 83, 795–800 (2015).

Nanoscale (1)

P. Ghosh, A. Kar, and A. Patra, “Energy transfer study between Ce3+ and Tb3+ ions in doped and core-shell sodium yttrium fluoride nanocrystals,” Nanoscale 2(7), 1196–1202 (2010).
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Nanotechnology (1)

M. Yu, H. Wang, C. K. Lin, G. Z. Li, and J. Lin, “Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4:Ce3+/Tb3+ particles with a core-shell structure,” Nanotechnology 17, 3245–3252 (2006).

Opt. Mater. Express (1)

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Z. Fu and W. Bu, “High efficiency green-luminescent LaPO4: Ce, Tb hierarchical nanostructures: Synthesis, characterization, and luminescence properties,” Solid State Sci. 10(8), 1062–1067 (2008).

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Figures (5)

Fig. 1
Fig. 1 X-ray diffraction patterns of (a) bare SiO2, and SiO2@LaPO4:Ce3+/Tb3+ particles annealed at 600 °C (b), 700 °C (c), 800 °C (d), and 900 °C (e), respectively.
Fig. 2
Fig. 2 SEM images of (a) SiO2 and (b) SiO2@LaPO4:Ce3+/Tb3+ annealing at 800°C and (c) the EDS spectrum of SiO2@LaPO4:Ce3+/Tb3+.
Fig. 3
Fig. 3 (a, b) TEM images of SiO2@LaPO4:Ce3+/Tb3+ samples annealing at 800°C and (c) a typical HRTEM image.
Fig. 4
Fig. 4 XPS spectrum of the SiO2@LaPO4:Ce3+/Tb3+ samples: the left-upper insert is the Tb 3d region, and the right-upper insert is the Ce 3d region.
Fig. 5
Fig. 5 Excitation and emission spectra for the luminescence of Ce3+ (a), Tb3+(b) in SiO2@LaPO4:Ce3+/Tb3+ particles, the energy transfer process (c), and the emission intensity with a sample heated to 800°C as inset (d).

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