Abstract
Rare earth ions (Ce3+, Eu2+) activated Ca3MgSi2O8 (CMSO) phosphors have been synthesized using solid-state reaction method in 95%N2+5%H2 reduction atmosphere at elevated temperatures by varying Eu2+ concentration from 0.0075 to 0.0300 at the fixed Ce0.03 concentration to study their photoluminescence (PL) properties. An energy transfer occurs from Ce3+ to Eu2+ through a significant overlap of Eu2+ excitation spectrum with Ce3+ emission spectrum in CMSO, together with the systematic relative decrease and increase in emission bands of Ce3+ and Eu2+, respectively, have been observed. To support the phenomenon, diffuse reflectance spectra show various absorption levels corresponding to Ce3+, Eu2+, and/or mixture of both rare earth ions. An optimum emission was realized at 0.0150 of Eu2+ via. energy transfer from Ce3+ ion. By utilizing the principle of energy transfer, the critical distance (R c ) between activator ions was found to be 18.64 Å. The CIE chromaticity coordinates measured on the Ca3MgSi2O8:Ce3+, Eu2+ phosphors excited under ultraviolet (365 nm) source shows the values lie in cool white light region could be applied to solid state lighting.
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K. Yamazaki, H. Nakabayashi, Y. Kotera, A. Ueno, J. Electrochem. Soc. 133, 657 (1986)
T.L. Barry, J. Electrochem. Soc. 115, 733 (1968)
T.L. Barry, J. Electrochem. Soc. 115, 1181 (1968)
A.A. Sabbagh Alvani, F. Moztarzadeh, A.A. Sarabi, J. Lumin. 115, 147 (2005)
Y. Chen, X. Cheng, M. Liu, Z. Oi, C. Shi, J. Lumin. 129, 531 (2009)
Y. Li, Y. Wang, Y. Gong, X. Xu, J. Electrochem. Soc. 156(4), J77 (2009)
Y. Xu, D. Chen, Ceram. Int. 34, 2117 (2008)
W. Pan, G. Ning, X. Zhang, J. Wang, Y. Lin, J. Ye, J. Lumin. 128, 1975 (2008)
H. Lihui, Z. Xiao, L. Xingren, J. Alloys Compd. 14, 305 (2000)
G. Blasse, A. Bril, J. Chem. Phys. 12, 5159 (1967)
S.H.M. Poort, G. Blasse, J. Lumin. 72–74, 247 (1997)
G. Blasse, W.L. Wanmaker et al., Philips Res. Rep. 23, 189 (1968)
Y. Lin, Z. Tang, Z. Zhang, C. Nan, J. Alloys Compd. 348, 76 (2003)
R.D. Shannon, Acta Cryst. A 32, 751 (1976)
N. Lakshminarashiman, U.V. Varadaraju, J. Electron. Chem. Soc. 152, H152 (2005)
E. Rodriguez, J.A. Munozi, J. Tocho, F. Cusso, J. Phys., Condens. Matter 6, 10625 (1994)
L.G. Van Uitert, J. Lumin. 29, 1 (1984)
L.G. Van Uitert, J. Electrochem. Soc. 114, 1048 (1967)
G. Blasse, Philips Res. Rep. 24, 131 (1969)
D.L. Dexter, J. Chem. Phys. 21, 836 (1953)
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Thiyagarajan, P., Ramachandra Rao, M.S. Cool white light emission on Ca3−(l+n)MgSi2O8:\(\mathrm{Ce}_{\mathrm{l}}^{3+}\), \(\mathrm{Eu}_{n}^{2+}\) phosphors and analysis of energy transfer mechanism. Appl. Phys. A 99, 947–953 (2010). https://doi.org/10.1007/s00339-010-5702-4
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DOI: https://doi.org/10.1007/s00339-010-5702-4