论文信息 - Wet chemical synthesis and luminescence in Ca5(PO4)3M:Eu2+ (M = Br, I) phosphors for solid state lighting

Wet chemical synthesis and luminescence in Ca5(PO4)3M:Eu2+ (M = Br, I) phosphors for solid state lighting

A simple wet chemical synthesis of Eu2+ activated Ca5(PO4)3Br and Ca5(PO4)3I phosphors and their photoluminescence is reported. Formation of Ca5(PO4)3Br is confirmed by X-ray diffraction (XRD). Synthesized phosphors are analyzed for photoluminescence (PL) spectrum. A bright blue emission is observed when phosphors are excited by near Ultra Violet (nUV) radiations. Photoluminescence emission spectrum for (Ca0.985Eu0.015)5(PO4)3Br is centered at 457 nm and for (Ca0.985Eu0.015)5(PO4)3 I it peaks at 455 nm when excited by 365 nm near UV radiation. Eu2+ luminescence in Ca5(PO4)3Br is reported for the first time. The phosphors can be efficiently excited by nUV radiations. This shows that phosphors may be used as blue phosphor in pcLED for Solid State Lighting.A simple wet chemical synthesis of Eu2+ activated Ca5(PO4)3Br and Ca5(PO4)3I phosphors and their photoluminescence is reported. Formation of Ca5(PO4)3Br is confirmed by X-ray diffraction (XRD). Synthesized phosphors are analyzed for photoluminescence (PL) spectrum. A bright blue emission is observed when phosphors are excited by near Ultra Violet (nUV) radiations. Photoluminescence emission spectrum for (Ca0.985Eu0.015)5(PO4)3Br is centered at 457 nm and for (Ca0.985Eu0.015)5(PO4)3 I it peaks at 455 nm when excited by 365 nm near UV radiation. Eu2+ luminescence in Ca5(PO4)3Br is reported for the first time. The phosphors can be efficiently excited by nUV radiations. This shows that phosphors may be used as blue phosphor in pcLED for Solid State Lighting.

S. Moharil | C. D. Mungmode | D. Gahane

[1] N. B. Ingale,et al. Synthesis and luminescence properties of Ca5(PO4)3Cl:Eu2+ phosphor for solid state lighting , 2016 .

[2] Zhan-chao Wu,et al. Preparation and thermally stable luminescence properties of a new blue Sr5Cl0.75F0.25(PO4)3: Eu2+ phosphor for WLEDs , 2015 .

[3] S. Dhoble,et al. Synthesis And Characterization Of Optoelectronics Bromoapatite Ca5(PO4)3Br:RE3+ (RE3+ = Ce3+, Dy3+ and Eu+3 Phosphors , 2014 .

[4] T. Wanjun,et al. A Single‐Phase Emission‐Tunable Ca5(PO4)3F:Eu2+,Mn2+ Phosphor with Efficient Energy Transfer for White LEDs , 2014 .

[5] Jilin Zhang,et al. Synthesis and luminescence of Eu2+-doped alkaline-earth apatites for application in white LED , 2010 .

[6] Guang Jia,et al. Facile synthesis and luminescence of Sr(5)(PO(4))(3)Cl:Eu(2+) nanorod bundles via a hydrothermal route. , 2010, Inorganic chemistry.

[7] Xun Wang,et al. Liquid–Solid–Solution Synthesis of Biomedical Hydroxyapatite Nanorods , 2006 .

[8] P. Schmidt,et al. Inorganic Luminescent Materials: 100 Years of Research and Application , 2003 .

[9] F. Auzel,et al. Oscillator strengths and laser effect in Na2Nd2Pb6(PO4)6Cl2 (chloroapatite), a new high‐Nd‐concentration laser material , 1979 .

[10] M. Greenblatt,et al. The crystal structures of the spodiosite analogs, Ca2CrO4Cl and Ca2PO4Cl , 1967 .