Synthesis and photoluminescence investigations of the white light emitting phosphor, vanadate garnet, Ca2NaMg2V3O12 co-doped with Dy and Sm

Abstract Vanadate garnet systems namely Ca 2 NaMg 2 V 3 O 12 , individually doped with Dy and Sm and also co-doped with both the RE ions were synthesized via the solid-state reaction route and their photoluminescence (PL) properties were investigated. The method of synthesis was verified by the formation of single phase compound through X-ray diffraction (XRD) studies. Existence of energy transfer in between the host and the dopant ions was established by PL investigation. Color coordinates of all the compounds were calculated and plotted on the CIE diagram. It was seen that the co-doped system has a near white light emission. It was concluded that this single phosphor is capable of converting the ultraviolet emission of a UV-LED into white light.

[1]  D. Krol,et al.  The VO3−4 and Eu3+ luminescence in oxides with ordered β-K2SO4 structure , 1976 .

[2]  A. Srivastava,et al.  Spectroscopic evaluation of a white light phosphor for UV-LEDs-Ca2NaMg2V3O12:Eu3+ , 2005 .

[3]  Yingliang Liu,et al.  Spectra and long-lasting properties of Sm3+-doped yttrium oxysulfide phosphor , 2004 .

[4]  P. Zavalij,et al.  Structural chemistry of vanadium oxides with open frameworks. , 1999, Acta crystallographica. Section B, Structural science.

[5]  Fujio Izumi,et al.  VESTA: a three-dimensional visualization system for electronic and structural analysis , 2008 .

[6]  Luminescent properties of a novel red-emitting phosphor: Eu3+-activated Ca3Sr3(VO4)4 , 2009 .

[7]  M. Stanley Whittingham,et al.  The Role of Ternary Phases in Cathode Reactions , 1976 .

[8]  M. Isobe,et al.  Direct fabrication of metavanadate phosphor films on organic substrates for white-light-emitting devices. , 2008, Nature materials.

[9]  Qian Yang,et al.  A novel broadband emission phosphor Ca2KMg2V3O12 for white light emitting diodes , 2010 .

[10]  G. Bayer.  Vanadates A3B2V3O12 with Garnet Structure , 1965 .

[11]  A. K. Tyagi,et al.  Rare-earth doped gadolinia based phosphors for potential multicolor and white light emitting deep UV LEDs , 2009, Nanotechnology.

[12]  J. Snijder,et al.  The position of the VO3−4 charge-transfer transition as a function of the VO distance , 1977 .

[13]  Liang Shi,et al.  Spectroscopy characteristics of vanadate Ca9Dy(VO4)7 for application of white-light-emitting diodes , 2009 .

[14]  Qing-li Zhang,et al.  High-resolution photoluminescence spectrum of GdVO4:Eu3+☆ , 2000 .

[15]  Zhaoqi Sun,et al.  Photoluminescence properties of Ca9Y(VO4)7 and Ca9Y0.95Ln0.05(VO4)7 (Ln3+ = Eu3+, Sm3+, Pr3+) , 2009 .

[16]  A. Yoshiasa,et al.  Vanadate garnet, Ca2NaMg2V3O12. , 2003, Acta crystallographica. Section C, Crystal structure communications.

[17]  Chung‐Hsin Lu,et al.  Preparation and characterization of tunable YVO4: Bi3+, Sm3+ phosphors , 2009 .

[18]  J. Boilot,et al.  Synthesis and Luminescence Properties of Colloidal YVO4:Eu Phosphors , 2000 .

[19]  M. Ma̧czka,et al.  Low-temperature and high-pressure structural behaviour of NaBi(MoO4)2- : an X-ray diffraction study , 2005 .

[20]  F. Hawthorne,et al.  The crystal chemistry of the M+VO3 (M+ = Li, Na, K, NH4, Tl, Rb, and Cs) pyroxenes , 1977 .