Luminescence Properties of Phosphor (Sr1-xBax) 1.95 SiO4: 0.05Eu2+

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The luminescence properties of green-yellow emitting (Sr1-xBax)1.95SiO4:0.05Eu2+ (0≤x≤1) phosphors were discussed in this paper. These phosphors were synthesized through the high temperature solid-state reaction technique and characterized by X-ray diffraction. The experimental results indicated that all the major phase of prepared phosphors gradually varied from α-Sr2SiO4 (x=0) phase to Ba2SiO4 (x=1) phase, and an intermediate phase between the two phases was observed at x=0.5. The excitation spectra (λem λem=524 nm) and emission spectra (λex λex=400 nm) showed a broad band character with peak located at 365 nm and range from 579 nm to 508 nm, respectively. With the increase of concentration of barium, the thermal stability of the phosphors increased first when x is less than 0.5, and then it decreased when x surpasses 0.5. In addition, luminescence intensity was enhanced with the barium concentration. Under the 400 nm NUV light excitation the (Sr1-xBax) 1.95SiO4:0.05Eu2+ phosphors have a potential application in white LED.

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March 2015

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[1] J.S. Kim, P.E. Jeon, J.C. Choi, H.L. Park, Emission color variation of M2SiO4: Eu2+ (M=Ba, Sr, Ca) phosphors for light-emitting diode, J. Solid State Communications 133 (2005) 187-190.

DOI: 10.1016/j.ssc.2004.10.017

Google Scholar

[2] H. He, R.L. Fu, X.F. Song, D.L. Wang, J.K. Chen, White light-emitting Mg0. 1Sr1. 9SiO4: Eu2+ phosphors, J. Journal of Luminescence 128 (2008) 489-493.

DOI: 10.1016/j.jlumin.2007.09.023

Google Scholar

[3] H. Yu, G.M. Gao, L. Kong, G.H. Li, S.C. Gan, G.Y. Hong, Synthesis and luminescence properties of a novel red-emitting phosphor SrCaSiO4: Eu3+ for ultraviolet white light-emitting diodes, J. Journal of rare earths, 29 (2011) 431.

DOI: 10.1016/s1002-0721(10)60474-7

Google Scholar

[4] J.H. Lee, Y.J. Kim, Photoluminescent properties of Sr2SiO4: Eu2+ phosphors prepared by solid-state reaction method, J. Materials Science and Engineering B 146 (2008) 99-102.

DOI: 10.1016/j.mseb.2007.07.052

Google Scholar

[5] X.G. Zhang, X.P. Tang, J.L. Zhang, M.L. Gong, An efficient and stable green phosphor SrBaSiO4: Eu2+ for light-emitting diodes, J. Journal of Luminescence 130 (2010) 2288-2292.

DOI: 10.1016/j.jlumin.2010.07.006

Google Scholar

[6] Y.J. Lu, G.Y. Shi, Q.H. Zhang, H.Z. Wang, Y.G. Li, Photoluminescence properties of Eu2+ and Mg2+ co-doped CaSi2O2N2 phosphor for white light LEDs, J. Ceramics International 38 (2012) 3427-3433.

DOI: 10.1016/j.ceramint.2011.12.055

Google Scholar

[7] S.K. Raut, N.S. Dhoble, S.J. Dhoble, Optical properties of Eu, Dy, Mn activated M2SiO4, (M2=Ca, Sr, Zn) orthosilicate phosphors, J. Journal of Luminescence 134 (2013) 325-332.

DOI: 10.1016/j.jlumin.2012.08.026

Google Scholar

[8] H.D. Nguyen, I.H. Yeo, S.I. Mho, Identification of The Two Luminescence Sites of Sr2SiO4: Eu2+ and (Sr, Ba)2SiO4: Eu2+ Phosphors, J. ECS Transactions, 28 (3) (2010) 167-173.

DOI: 10.1149/1.3367223

Google Scholar

[9] M.Q. Guo, L.H. Huang, S.L. Zhao, D.G. Deng, H.P. Wang, Y.J. Hua, G.H. Jia, S.Q. Xu, Fluorine effects on Sr1. 7Mg0. 3SiO4: 0. 01Eu2+, 0. 08Mn2+ phosphors for white light-emitting diodes, J. Journal of Luminescence 134 (2013) 96-99.

DOI: 10.1016/j.jlumin.2012.09.006

Google Scholar

[10] T. Joseph, M.T. Sebastian, Microwave dielectric properties of alkaline earth orthosilicates M2SiO4 (M=Ba, Sr, Ca), J. Materials Letters 65 (2011) 891-893.

DOI: 10.1016/j.matlet.2010.11.063

Google Scholar

[11] A. Birkel, N.A. DeCino, N.C. George, K.A. Hazelton, B.C. Hong, R. Seshadri, Eu2+-doped M2SiO4 (M = Ca, Ba) phosphors prepared by a rapid microwave-assisted sol-gel method, J. Phase formation and optical properties: Solid State Sciences 19 (2013).

DOI: 10.1016/j.solidstatesciences.2013.02.003

Google Scholar

[12] X.C. Wang, X.Y. Zhang, C. Wang, W.D. Qin, J.X. Sun, Influences of phase composition on Sr3SiO5: Eu2+ luminous performance, J. Journal of rare earths 31 (2013) 456.

DOI: 10.1016/s1002-0721(12)60303-2

Google Scholar

[13] C.H. Huang, W.R. Liu, T.S. Chanc, Y.T. Lai, Orangish-yellow-emitting Ca3Si2O7: Eu2+ phosphor for application in blue-light based warm-white LEDs, J. Dalton Transactions 10 (2014) 1039-1045.

DOI: 10.1039/c4dt00076e

Google Scholar

[14] J. Shang, K.Q. Qiu, X.L. Lu, K. Zhao, L. Zhang, The luminescence properties of a novel oxynitride phosphor Sr3-yEuySiO5-6xN4x, J. Optical Materials 35 (2013) 1642-1645.

DOI: 10.1016/j.optmat.2013.04.019

Google Scholar

[15] J.S. Lee, Y.J. Kim, Effects of barium on luminescent properties of Sr2-xBaxSiO4: Eu2+ nanoparticles, J. Ceramics International 39 (2013) 555–558.

DOI: 10.1016/j.ceramint.2012.10.134

Google Scholar

[16] G, Blasse, Thermal Quenching of Characteristic Fluorescence, J. The Journal of Chemical Physics 51 (1969) 3529-3530.

DOI: 10.1063/1.1672543

Google Scholar