Energy transfer studies of Dy3+ ions doped K2GdF5 crystal
Main Article Content
Abstract
Abstract. Dy3+ -doped K2GdF5 single crystals were synthesized under hydrothermal condition. The UV excitation spectra and lifetimes of K2GdF5:Dy3+ were measured at room temperature. The excitation spectra have shown charge transfer state (CTS) of Dy3+ and energy transfer from Gd3+ to Dy3+ ions in K2GdF5:Dy3+ crystal. The decay curve of the K2GdF5 sample doped with 5.0 mol % Dy3+ ions is a non – exponential curve and is well fitted to the Inokuti – Hirayama model for S = 6. The energy transfer parameters (Q, CDA) and the critical distance (R0) are calculated.
Keywords: K2GdF5 single crystal, Inokuti – Hirayama model.
References
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[14] M. Inokuti, F. Hirayyama. J. Chem. Phys. 43 (1965) 1978
[2] P. Nachimuthu, R. Jagannathan, V. N. Kumar, D.N. Rao, Absorption and emission spectral studies of Sm3+ and Dy3+ ions in PbO.PbF2 glasses, J. Non-Cryst. Solids 217 (1997) 215-223.
[3] G. Lakshminarayana, J. Qiu, Photoluminescense of Pr3+, Sm3+ and Dy3+: SiO2 – Al2O3 – LiF – GdF3 glass ceramics and Sm3+, Dy3+:GeO2- B2O3 – ZnO – LaF3, Physica B. 404 (2009) 1169 – 1180
[4] H.W. Kui, D. Lo, Y.C. Tsang, N.M. Khaidukov, V.N. Makhop, Thermoluminescence properties of double potassium yttrium fluorides singly doped with Ce3+, Tb3+, Dy3+ and Tm3+ in reponse to α and β irradiation, J. Lumin 117 (2006) 29-38.
[5] E.C. Silva, N.M. Khaidukov, M.S. Nogueira, L.O. Faria, Investigation of the TL response of K2YF5:Dy3+ crystals to X and gamma radiation fields, Radiat. Meas 42 (2007) 311 - 315
[6] S. Bigotta, M.Tonelli, E. Cavalli, A. Belletti, Optical spectra of Dy3+ in KY3F10 and LiLuF4 crystalline fibers, J. Lumin 130 (2010) 13-17.
[7] D. Parisi, A. Toncelli, M. Tonelli, E. Cavalli, E. Bovero, A. Belletti, Optical spectroscopy of BaY2F8:Dy3+, J. Phy 17 (2005) 2783 – 2790.
[8] M.G. Brik, T. Ishii, A.M. Tkachuk, S.E. Ivanova, I.K. Razumova, Calculations of the transitions intensities in the optical spectra of Dy3+:LiYF4, J. Alloys Compd 374 (2004) 63-68.
[9] P.V. Do, V.P. Tuyen, V.X. Quang, N.T. Thanh, V.T.T. Ha, N. M. Khaidukov, Y.I Lee, B.T. Huy, Judd – Ofelt analysis of spectroscopic properties of Sm3+ in K2YF5, J. Alloys Compd. 520 (2012) 262-265.
[10] K. Binnemans, C. Goerller-Walrand, J.L. Adam, Spectroscopic properties of Gd3+ doped fluorozirconate glass, Chemical Physics Letters 280 ( 1977) 333-338.
[11] G. Lakshminarayana, H. Yang, J. Qiu, White light emission from Tm3+/Dy3+ co-doped oxyfluoride germanate glasses under UV light excitation., J.of Solid State Chemystry 182 (2009) 669-676
[12] P. Babu, K.Y. Jang, E.S. Kim, L. Shi, R. Vijija, V. Lavin, C.K. Jayasankar, Optical properies and energy transfer of Dy3+-doped transparant oxyfluoride glasses and glass-ceramics, J.Non-Crystalline Solids 356 (2010) 236-243
[13] T. Suhasini, J. Suresh Kumar, T. Sasikala, K. Jang, H.S. Lee, M. Jayasimhadri, J.H. Jeong, S.S. Yi, L. Rama Moorthy, Absorption and fluorescence properties of Sm3+ ions in fluoride containing phosphate glasses, Opt. Mater. 31 (2009) 1167-1172.
[14] M. Inokuti, F. Hirayyama. J. Chem. Phys. 43 (1965) 1978