Abstract
In this work, two series of phosphors of Sr9−xIn(PO4)7:xEu2+ and Sr8.97In1−yLuy(PO4)7:0.03Eu2+ with β-Ca3(PO4)2-type structure are prepared via a high temperature solid-state reaction. The XRD, photoluminescence, photoluminescence excitation spectra and decay times are investigated in detail. Upon excitation at 365 nm, the Sr9−xIn(PO4)7:xEu2+ phosphors show a obvious band centered at 410 nm and a little hump peaked at 630 nm ascribed to the 4f65d1–4f7 transitions of Eu2+ in different crystallographic sites. The excitation spectra show a broad band in the 250–500 nm, which is well-matched with the NUV LED chip. For the Sr8.97In1−yLuy(PO4)7:0.03Eu2+ phosphors, the another emission band centered at 520 nm emerged with the substitution of Lu3+ for In3+ on the basis of Sr9In(PO4)7:Eu2+ phosphor under the 365 nm excitation, which indicates that the presence of different Eu2+ luminescence centers. And emitting-color can be tuned from bluish-violet to white and yellow-green by varying the ratio of Lu3+ and In3+. Our results indicate these phosphors can be as an attractive candidate for the application of white LEDs by ions substitution to obtain white light and tunable luminescent.
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W. Sun, Y. Jia, R. Pang, H. Li et al., Sr9Mg(1.5)(PO4)7:Eu(2+): a novel broadband orange-yellow-emitting phosphor for blue light-excited warm white LEDs. ACS Appl. Mater. Interfaces 7, 25219–25226 (2015)
W.B. Im, Y.-I. Kim, N.N. Fellows, H. Masui et al., A yellow-emitting Ce3+ phosphor, La1−xCexSr2AlO5, for white light-emitting diodes. Appl. Phys. Lett. 93, 091905 (2008)
S. Zhang, Y. Li, Y. Lv, L. Fan, Y. Hu, M. He, A full-color emitting phosphor Ca9Ce(PO4)7:Mn2+, Tb3+: efficient energy transfer, stable thermal stability and high quantum efficiency. Chem. Eng. J. 322, 314–327 (2017)
X. Dong, J. Zhang, L. Zhang, X. Zhang, Z. Hao, Y. Luo, Yellow-emitting Sr9Sc(PO4)7:Eu2+, Mn2+ phosphor with energy transfer for potential application in white light-emitting diodes. Eur. J. Inorg. Chem. 2014, 870–874 (2014)
J. Zhang, M. Chen, Y. Gao, Investigation on luminescence of Na3Ca6(PO4)5:Eu2+ phosphor for LEDs. Display 49, 35–39 (2017)
J. Zhang, C. Jiang, Photoluminescence properties of emission-tunable Ca8MgLa(PO4)7: Eu2+, Mn2+ phosphors for white LEDs. Opt. Mater. Express 4, 2102 (2014)
Y. Liu, J. Zhang, C. Zhang, J. Xu et al., Phosphors: Ba9Lu2Si6O24:Ce3+: an efficient green phosphor with high thermal and radiation stability for solid-state lighting. Adv. Opt. Mater. 3, 1096–1101 (2015)
Y. Liu, J. Silver, R.-J. Xie, J. Zhang et al., An excellent cyan-emitting orthosilicate phosphor for NUV-pumped white LED application. J. Mater. Chem. C 5, 12365–12377 (2017)
X. Ji, J. Zhang, Y. Li, S. Liao et al., Improving quantum efficiency and thermal stability in blue-emitting Ba2 – xSrxSiO4: Ce3+ phosphor via solid solution. Chem. Mater. 30, 5137–5147 (2018)
M. Chen, Z. Xia, M.S. Molokeev, C.C. Lin et al., Probing Eu2+ luminescence from different crystallographic sites in Ca10M(PO4)7:Eu2+ (M = Li, Na, and K) with β-Ca3(PO4)2-type structure. Chem. Mater. 29, 7563–7570 (2017)
J. Cui, L. Wang, Q. Shi, Y. Tian, P. Huang, C.e. Cui, Color-tunable luminescence and energy transfer of Eu2+/Mn2+ co-doped Sr9Lu(PO4)7 phosphors for white LEDs. Polyhedron. 141, 284–288 (2018)
X. Dong, J. Zhang, X. Zhang, Z. Hao, S. Lv, Synthesis and photoluminescence properties of Eu2+ doped Sr9Sc(PO4)7 phosphors for white light-emitting diodes. Ceram. Int. 40, 5421–5423 (2014)
C.-H. Huang, Y.-C. Chen, T.-M. Chen, T.-S. Chan, H.-S. Sheu, Near UV-pumped yellow-emitting Sr8MgSc(PO4)7:Eu2+ phosphor for white-light LEDs with excellent color rendering index. J. Mater. Chem. 21, 5645 (2011)
C.-H. Huang, Y.-C. Chiu, Y.-T. Yeh, T.-M. Chen, Novel Eu2+-activated yellow-emitting Sr8MgLu(PO4)7 phosphors for white-light near-ultraviolet LEDs. Mater. Express 2, 303–310 (2012)
C.H. Huang, T.M. Chen, Novel yellow-emitting Sr8MgLn(PO4)7:Eu2+ (Ln = Y, La) phosphors for applications in white LEDs with excellent color rendering index. Inorg. Chem. 50, 5725–5730 (2011)
C.-H. Huang, D.-Y. Wang, Y.-C. Chiu, Y.-T. Yeh, T.-M. Chen, Sr8MgGd(PO4)7:Eu2+: yellow-emitting phosphor for application in near-ultraviolet-emitting diode based white-light LEDs. RSC Adv. 2, 9130 (2012)
A.A. Belik, F. Izumi, T. Ikeda, M. Okui et al., Whitlockite-related phosphates Sr9A(PO4)7 (A = Sc, Cr, Fe, Ga, and In): structure refinement of Sr9In(PO4)7 with synchrotron X-ray powder diffraction data. J. Solid State Chem. 168, 237–244 (2002)
L.G.V. Uitert, An empirical relation fitting the position in energy of the lower d-band edge for Eu2+ or Ce3+ in various compounds. J. Lumin. 29, 1–9 (1984)
J. Zhang, C. Jiang, Luminescence properties of Ca14Mg2(SiO4)8: Eu2+ from various Eu2+ sites for white-light-emitting diodes. Mater. Res. Bull. 60, 467–473 (2014)
J. Liao, L. Nie, Q. Wang, S. Liu, J. Fu, H.-R. Wen, Microwave hydrothermal method and photoluminescence properties of Gd2Sn2O7: Eu3+ reddish orange phosphors. J. Lumin. 183, 377–382 (2017)
G. Blasse, Energy transfer in oxidic phosphors. Phys. Lett. A 28(6), 444–445 (1968)
L.G. Van Uitert, Characterization of energy transfer interactions between rare earth ions. J. Electrochem. Soc. 114, 1048 (1967)
C.H. Huang, Y.C. Chiu, Y.T. Yeh, T.S. Chan, T.M. Chen, Eu(2+)-activated Sr8ZnSc(PO4)7: a novel near-ultraviolet converting yellow-emitting phosphor for white light-emitting diodes. ACS Appl. Mater. Interfaces. 4, 6661–6668 (2012)
Y. Jia, W. Lu, N. Guo, W. Lu, Q. Zhao, H. You, Utilizing Tb3+ as an energy transfer bridge to connect Eu2+-Sm3+ luminescent centers: realization of efficient Sm3+ red emission under near-UV excitation. Chem. Commun. (Camb.). 49, 2664–2666 (2013)
D.L. Dexter, J.H. Schulman, Theory of concentration quenching in inorganic phosphors. J. Chem. Phys. 22, 1063–1070 (1954)
W. Lv, Y. Jia, Q. Zhao, W. Lü et al., Synthesis, structure, and luminescence properties of K2Ba7Si16O: Eu2+ for white light emitting diodes. J. Phys. Chem. C 118, 4649–4655 (2014)
H. Li, R. Zhao, Y. Jia, W. Sun et al., Sr1.7Zn0.3CeO4: Eu3+ novel red-emitting phosphors: synthesis and photoluminescence properties. ACS Appl. Mater. Interfaces. 6, 3163–3169 (2014)
Acknowledgements
This work was financially supported by the Natural Science Foundation of Shanxi Province (201601d011030), Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi, and school fund of Taiyuan University of Technology (1205-04020102).
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Yu, Q., Wang, L., Huang, P. et al. Synthesis and photoluminescence properties of Eu2+-activated Sr9In1−yLuy(PO4)7 phosphors. J Mater Sci: Mater Electron 31, 196–201 (2020). https://doi.org/10.1007/s10854-018-0501-3
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DOI: https://doi.org/10.1007/s10854-018-0501-3