Dual-Mode Luminescence with Broad Near UV and Blue Excitation Band from Sr2CaMoO6:Sm3+ Phosphor for White LEDs

Dual-mode excitation properties were introduced in Sm3+ doped Sr2CaMoO6 prepared by a high temperature solid state reaction technique. Two ways are available to generate white light in the single-component phosphor activated by Sm3+ ions. Warm white light can be obtained from Sr1.995Sm0.005CaMoO6 phosphor pumped by 380 or 411 nm excitation energy. The full visible spectral emission of the single-phase phosphor comes from the high and low level emission lines of Sm3+ ions as well as the intrinsic luminescence of MoO6 group. It is also competitive as yellow-emitting phosphor for blue pumped white LEDs and gives three emission bands at 567, 603, and 650 nm, presenting yellow luminescence upon 466 nm radiation. The 650 nm red emission band corresponding to 4G5/2 → 6H9/2 transition of Sm3+ can make its color rendering index better. The excellent photoluminescence of Sr2CaMoO6 is related to the partial tilting CaO6 octahedral and the lowered symmetry were confirmed by General Structure Analysis System. Band gap...

[1]  S. Raut,et al.  Precipitation based synthesis and luminescence of Ln3+ (Eu, Ce, Dy, Sm, Tb) activated BaCa2Si3O9-Walstromite cyclosilicate phosphors , 2014 .

[2]  Suqing Zhao,et al.  Electrospinning preparation and luminescence properties of one-dimensional SrWO4: Sm3+ nanofibers , 2014, Journal of Materials Science: Materials in Electronics.

[3]  J. Jeong,et al.  Charge transfer bands of Mo–O and photoluminescence properties of micro-material Y2MoO6:Eu3+ red phosphor , 2014 .

[4]  Le Zhang,et al.  Structure evolution and tunable luminescence of (Sr0.98−mBamEu0.02)2Ca(Mo1−nWn)O6 phosphor with ultraviolet excitation for white LEDs , 2013 .

[5]  Younian Liu,et al.  High colour purity single-phased full colour emitting white LED phosphor Sr2V2O7 : Eu3+ , 2013 .

[6]  Hao Wu,et al.  Improved luminescence of Y2MoO6:Eu3+ by doping Li+ ions for light-emitting diode applications , 2012 .

[7]  Jun Lin,et al.  LaOF:Eu3+ nanocrystals: hydrothermal synthesis, white and color-tuning emission properties. , 2012, Dalton transactions.

[8]  C. Duan,et al.  Efficient red-emitting phosphor for near-ultraviolet-based solid-state lighting. , 2011, Optics letters.

[9]  L. R. Moorthy,et al.  Photoluminescence and energy transfer properties of Sm3+ doped CFB glasses , 2011 .

[10]  Shu-Fen Hu,et al.  Highly Stable Red Oxynitride β-SiAlON:Pr3+ Phosphor for Light-Emitting Diodes , 2011 .

[11]  Xianping Fan,et al.  Synthesis and luminescence properties of a novel red SrMoO4:Sm3+,R+ phosphor , 2011 .

[12]  Q. Su,et al.  A host sensitized reddish-orange Gd2MoO6:Sm3+ phosphor for light emitting diodes , 2011 .

[13]  Xiaojun Wang,et al.  CaSc2O4:Eu3+: A tunable full-color emitting phosphor for white light emitting diodes , 2011 .

[14]  Chien-Chung Lin,et al.  Improving Optical Properties of White LED Fabricated by a Blue LED Chip with Yellow/Red Phosphors , 2010 .

[15]  W. Hou,et al.  A new single-host white-light-emitting BaSrMg(PO4)2: Eu2+ phosphor for white-light-emitting diodes , 2010 .

[16]  Z. Xia,et al.  Synthesis and Luminescence Properties of BaMoO4:Sm3+ Phosphors , 2010 .

[17]  Hajime Yamamoto,et al.  White LED phosphors: the next step , 2010, OPTO.

[18]  Chunfang Wu,et al.  Hydrothermal synthesis and vacuum ultraviolet-excited luminescence properties of novel Dy3+-doped LaPO4 white light phosphors , 2009 .

[19]  Sea-Fue Wang,et al.  Structural Characterization and Luminescent Properties of a Red Phosphor Series: Y2−xEux(MoO4)3 (x=0.4–2.0) , 2009 .

[20]  P. Woodward,et al.  Magnetic and structural properties of NaLnMnWO6 and NaLnMgWO6 perovskites , 2009 .

[21]  Jing Zhao,et al.  Molten Salt Synthesis, Characterization, and Luminescence Properties of Gd2MO6:Eu3+ (M=W, Mo) Phosphors , 2009 .

[22]  Ximing Yuan,et al.  Enhancement emission intensity of CaMoO4 : Eu3+, Na+ phosphor via Bi co-doping and Si substitution for application to white LEDs , 2009 .

[23]  James S. Speck,et al.  Prospects for LED lighting , 2009 .

[24]  B. C. Jamalaiah,et al.  Photoluminescence properties of Sm3+ in LBTAF glasses , 2009 .

[25]  U. Varadaraju,et al.  Synthesis, phase transition and photoluminescence studies on Eu3+-substituted double perovskites—A novel orange-red phosphor for solid-state lighting , 2008 .

[26]  Yong-Seog Kim,et al.  Energy transfer-based spectral properties of Tb-, Pr-, or Sm-codoped YAG:Ce nanocrystalline phosphors , 2008 .

[27]  Jae Hyuk Lee,et al.  Synthesis of Nanosized Ce3+,Eu3+-Codoped YAG Phosphor in a Continuous Supercritical Water System , 2008 .

[28]  Hui Zeng,et al.  White-light long-lasting phosphor Sr2SiO4:Pr3+ , 2008 .

[29]  Hilmi Volkan Demir,et al.  Color-converting combinations of nanocrystal emitters for warm-white light generation with high color rendering index , 2008 .

[30]  Q. Su,et al.  Luminescence investigation of Eu3+–Sm3+ co-doped Gd2−x−yEuxSmy(MoO4)3 phosphors as red phosphors for UV InGaN-based light-emitting diode , 2007 .

[31]  Won Bin Im,et al.  Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs , 2007 .

[32]  Xiaojun Wang,et al.  A white light phosphor suitable for near ultraviolet excitation , 2007 .

[33]  U. Pal,et al.  Use of diffuse reflectance spectroscopy for optical characterization of un-supported nanostructures , 2007 .

[34]  U. Varadaraju,et al.  A Promising Orange-Red Phosphor Under Near UV Excitation , 2006 .

[35]  J. Philipp,et al.  Structural and doping effects in the half-metallic double perovskite A 2 CrWO 6 (A=Sr, Ba, and Ca) , 2003, cond-mat/0306357.

[36]  Jiye Fang,et al.  Effect of Ag substitution on the transport property and magnetoresistance of LaMnO3 , 2002 .

[37]  Y. Tomioka,et al.  Colossal Magnetoresistive Manganites , 2010 .

[38]  M. Schuurmans,et al.  On the nonradiative and radiative decay rates and a modified exponential energy gap law for 4f–4f transitions in rare‐earth ions , 1983 .

[39]  D. L. Wood,et al.  Weak Absorption Tails in Amorphous Semiconductors , 1972 .