Energy transfer based emission analysis of Dy3+/Eu3+ co-doped ZANP glasses for white LED applications

Abstract The results presented here are on the photoluminescence properties of different concentrations of Eu 3+ in a 0.5 mol% Dy 3+ doped zinc-aluminium-sodium-phosphate (ZANP) glasses. Under UV-light excitation the 0.5 mol% ZANP glass show a yellowish white light emission and in order to obtain white light emission, the Dy 3+ /Eu 3+ co-doped ZANP glasses with fixed Dy 3+ concentration (0.5 mol%) and varied Eu 3+ concentration (0.1–1.5 mol%) were synthesized. The energy transfer phenomenon between Dy 3+ and Eu 3+ ions was studied based from the emission spectra with different excitation wavelengths and the decay curves of the 4 F 9/2 level of Dy 3+ ion. The energy transfer efficiency (ɳ) and energy transfer probabilities (P da ) are calculated for Dy 3+ /Eu 3+ co-doped ZANP glasses. The energy transfer probabilities are linear with the acceptor (Eu 3+ ) concentration confirming the fact that the dipole–dipole interaction is responsible for the energy transfer (ET) process of Dy 3+ →Eu 3+ ion. The chromaticity co-ordinates were calculated from emission spectra of Dy 3+ /Eu 3+ co-doped ZANP glasses with different excitation wavelengths. These results show that the white light has been achieved by exciting Dy 3+ /Eu 3+ co-doped ZANP glass with ultraviolet or blue light.

[1]  D. L. Dexter.  A Theory of Sensitized Luminescence in Solids , 1953 .

[2]  Xiaohong Yan,et al.  Green–white–yellow tunable luminescence from Dy3+–Tb3+–Eu3+ doped transparent glass ceramics containing GdSr2F7 nanocrystals , 2013 .

[3]  J. Pisarska,et al.  Optical transitions of Eu3+ and Dy3+ ions in lead phosphate glasses. , 2011, Optics letters.

[4]  Y. Yue,et al.  Eu-, Tb-, and Dy-Doped Oxyfluoride Silicate Glasses for LED Applications , 2014 .

[5]  B. C. Joshi,et al.  Sensitizing Eu3+ by Dy3+ in zinc phosphate glass , 2005 .

[6]  M. Inokuti,et al.  Influence of Energy Transfer by the Exchange Mechanism on Donor Luminescence , 1965 .

[7]  Y. Yue,et al.  Composition dependence of luminescence of Eu and Eu/Tb doped silicate glasses for LED applications , 2013 .

[8]  C. Shi,et al.  Potential white-light long-lasting phosphor: Dy3+-doped aluminate , 2005 .

[9]  I. Kityk,et al.  White light emission from Sm3+/Tb3+ codoped oxyfluoride aluminosilicate glasses under UV light excitation , 2009 .

[10]  K. J. Rao,et al.  Structural Chemistry of Glasses , 2002 .

[11]  Y. C. Ratnakaram,et al.  Radiative properties and luminescence spectra of Sm3+ ion in zinc–aluminum–sodium-phosphate (ZANP) glasses , 2015 .

[12]  Mamoru Mitomo,et al.  Highly efficient white-light-emitting diodes fabricated with short-wavelength yellow oxynitride phosphors , 2006 .

[13]  Jianrong Qiu,et al.  White light emission from Tm3+/Dy3+ co-doped oxyfluoride germanate glasses under UV light excitation , 2009 .

[14]  M. Czaja,et al.  Optical properties of Pr3+, Sm3+ and Er3+ doped P2O5–CaO–SrO–BaO phosphate glass , 2010 .

[15]  M. Graça,et al.  Eu3+ luminescence in aluminophosphate glasses , 2014 .

[16]  Ying-liang Liu,et al.  White-light-emitting long-lasting phosphorescence in Dy3+-doped SrSiO3 , 2006 .

[17]  Y. C. Ratnakaram,et al.  Structural and luminescence properties of Dy3+ ion in strontium lithium bismuth borate glasses , 2012 .

[18]  G. Vijaya Prakash,et al.  Controllable white light emission from Dy3+–Eu3+ co-doped KCaBO3 phosphor , 2011 .

[19]  Hai Lin,et al.  Intense visible fluorescence and energy transfer in Dy3+, Tb3+, Sm3+ and Eu3+ doped rare-earth borate glasses , 2005 .

[20]  E. Fred Schubert,et al.  Light-Emitting Diodes , 2003 .

[21]  P. Hagenmuller,et al.  White light emitting glasses , 1991 .

[22]  R. Xie,et al.  Eu2+-doped Ca-α-SiAlON: A yellow phosphor for white light-emitting diodes , 2004 .

[23]  A. F. Wells,et al.  Structural Inorganic Chemistry , 1971, Nature.

[24]  Gaorong Han,et al.  Eu/Dy ions co-doped white light luminescence zinc–aluminoborosilicate glasses for white LED , 2008 .

[25]  N. Soga,et al.  Yellow/blue Iuminescences of Dy3+ doped borate glasses and their anomalous temperature variations , 1998, Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals.

[26]  Xia Wan,et al.  Luminescence and energy transfer in Dy3+/Tb3+ co-doped CaO–Al2O3–B2O3–RE2O3 glass , 2011 .

[27]  G. S. Ofelt.  Structure of the f6 Configuration with Application to Rare‐Earth Ions , 1963 .

[28]  V. H. Romero,et al.  Efficient photoluminescence of Dy3+ at low concentrations in nanocrystalline ZrO2 , 2008 .

[29]  V. Nampoori,et al.  Energy transfer in Sm3+:Eu3+ system in zinc sodium phosphate glasses , 2004 .

[30]  Y. C. Ratnakaram,et al.  Effect of ZnO on spectroscopic properties of Sm3+ doped zinc phosphate glasses , 2015 .

[31]  A.M.A. van Dongen,et al.  Europium (III) in oxide glasses: Dependence of the emission spectrum upon glass composition , 1989 .

[32]  J. Adam,et al.  Spectroscopic properties of Pr3+ ions in fluorophosphate glass , 1999 .

[33]  N. Veeraiah,et al.  Influence of modifier oxide on spectroscopic and thermoluminescence characteristics of Sm3+ ion in antimony borate glass system , 2008 .

[34]  R. S. Rana,et al.  Optical spectra and energy level analysis of Dy3+:LaCl3 , 1988 .

[35]  Chenxia Li,et al.  Eu2+/Dy3+ co-doped white light emission glass ceramics under UV light excitation , 2011 .

[36]  Xiaoluan Liang,et al.  Luminescence properties of Tb doped and Tm/Tb/Sm co-doped glasses for LED applications , 2010 .

[37]  Nathalia P. S. M. Rios,et al.  Spectroscopic study and white-light simulation using praseodymium-doped fluorogermanate glass as single phosphor for white LEDs , 2012 .

[38]  J. I. Escalante-García,et al.  Glass–ceramic materials with regulated dielectric properties based on the system BaO–PbO–TiO2–B2O3–Al2O3 , 2004 .

[39]  S. Buddhudu,et al.  Energy transfer based enhanced red emission intensity from (Eu3+, Tb3+):LFBCd optical glasses , 2013 .

[40]  D. Noh,et al.  Rare earth double activated phosphors for different applications , 2010 .

[41]  S. Tie,et al.  White light emission and energy transfer in Dy3+/Eu3+ co-doped aluminoborate glass , 2012 .

[42]  J. S. Kim,et al.  Full-color Ba3MgSi2O8:Eu2+, Mn2+ phosphors for white-light-emitting diodes , 2005 .

[43]  Weili Lu,et al.  Energy transfer and colorimetric properties of Eu3+/Dy3+ co-doped Gd2(MoO4)3 phosphors , 2010 .