Sr2SiO4: Eu phosphor for white light emitting diodes (LEDs) was synthesized by employing an as-prepared (Sr, Eu)CO3@SiO2 core-shell precursor as starting materials, and the effect of the core-shell precursor was also discussed on the crystal structure, particle morphology and luminescent properties of the resultant phosphor. The results showed that the hybrid β- and α′-Sr2SiO4: Eu phosphor with fine particle size and narrow distribution could be obtained at a lower firing temperature than that in conventional solidstate reaction method, and its formation mechanism was deduced to be (Sr, Eu)CO3 diffusion controlled reaction process. Responded to its hybrid crystal structure, this phosphor exhibited the combined luminescence of β- and α′-Sr2SiO4: Eu.
Park, J.K., Lim, M.A., Kim, C.H., Park, J.T. and Choi, S.Y. (2003) White light-emitting diodes of GaN-based Sr2SiO4:Eu and the luminescent properties. Applied Physics Letters, 82, 683-685. doi:10.1063/1.1544055
Kim, J.S., Park, Y.H., Choi, J.C. and Park, H.L. (2005) Optical and structural properties of Eu2+-doped (Sr1?xBax)2SiO4 phosphors. Journal of the Electrochemical Society, 152, H135-H137. dio:10.1149/1.1971065
Lee, J.H. and Kim, Y.J. (2008) Photoluminescent properties of Sr2SiO4:Eu2+ phosphors prepared by solid-state reaction method. Materials Science and Engineering B, 146, 99-102. doi:10.1016/j.mseb.2007.07.052
Hsu, C., Jagannathan, R. and Lu, C. (2010) Luminescent enhancement with tunable emission in Sr2SiO4:Eu2+ phosphors for white LEDs. Materials Science and Engineering: B, 167, 137-141.
Zhang, X.G., Tang, X.P., Zhang, J.L. and Gong, M.L. (2010) An efficient and stable green phosphor SrBaSiO4:Eu2+ for light-emitting diodes. Journal of Luminescence, 130, 2288-2292. doi:10.1016/j.jlumin.2010.07.006
Guo, H., Wang, X.F., Zhang, X.B., Tang, Y.F., Chen, L.X. and Ma, C.G. (2010) Effect of NH4F flux on structural and luminescent properties of Sr2SiO4:Eu2+ phosphors prepared by solid-state reaction method. Journal of the Electrochemical Society, 157, J310-J314.
Kang, H.S., Hong, S.K., Kang, Y.C., Jung, K.Y., Shul, Y.G. and Park, S.B. (2005) The enhancement of photoluminescence characteristics of Eu-doped barium strontium silicate phosphor particles by co-doping materials. Journal of Alloys and Compounds, 402, 246-250.
Hsu, W., Sheng, M. and Tsai, M. (2009) Preparation of Eu-activated strontium orthosilicate (Sr1.95SiO4:Eu0.05) phosphor by a sol-gel method and its luminescent properties. Journal of Alloys and Compounds, 467, 491-495.
Lei, B.F., Machida, K., Horikawa, T. and Hanzawa, H. (2010) Facile combustion route for low-temperature preparation of Sr2SiO4:Eu2+ phosphor and its photoluminescence properties. Japanese Journal of Applied Physics, 49, 095001-095006.
Chang, Y.L., Hsiang, H., Lan, F.T., Mei, L.T. and Yen, F.S. (2010) Synthesis of Sr2SiO4 nanometer particles from the core-shell precursor of SrCO3/SiO2. Journal of Alloys and Compounds, 500, 108-112.
Pieper, G., Eysel, W. and Hahn, T. (1972) Solid solubility and polymorphism in the system Sr2SiO4-Sr2GeO4-Ba2GeO4-Ba2SiO4. Journal of American Ceramic Society, 55, 619-622. doi:10.1111/j.1151-2916.1972.tb13455.x
Catti, M. and Gazzoni, G. (1983) The β?α' phase transition of Sr2SiO4. II: X-ray and optical study, and ferroelasticity of the β form. Acta crystallographica. Section B, 39, 679-684.
Nishioka, H., Watari, T., Eguchi, T. and Yada, M. (2011) Synthesis and luminescent properties of Sr2SiO4 phosphors. IOP Conference Series: Materials Science and Engineering, 18, 102008.
Lu, C.H. and Wu, P.C. (2008) Reaction mechanism and kinetic analysis of the formation of Sr2SiO4 via solid-state reaction. Journal of Alloys and Compounds, 466, 457-462. doi:10.1016/j.jallcom.2007.11.066
Won, Y.S. and Park, S.S. (2010) Density functional theory study on two-peak emission of Eu2+ activators in Sr2SiO4. Journal of Physics and Chemistry of Solids, 71, 1742-1745. doi:10.1016/j.jpcs.2010.09.008