Synthesis of high efficient Ca 2SiO 4:Eu 2 green emitting phosphor by a liquid phase precursor method

Y. Y. Luo; D. S. Jo; K. Senthil; S. Tezuka; M. Kakihana; K. Toda; T. Masaki; D. H. Yoon

doi:10.1016/j.jssc.2011.11.046

Synthesis of high efficient Ca ₂SiO ₄:Eu ² green emitting phosphor by a liquid phase precursor method

Y. Y. Luo, D. S. Jo, K. Senthil, S. Tezuka, M. Kakihana, K. Toda, T. Masaki, D. H. Yoon

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

Green emitting Eu ²-doped Ca ₂SiO ₄ phosphors were synthesized by three different methods (a conventional solid state reaction (SSR) method, a novel liquid phase precursor approach using SiO ₂ sol (LPP-SiO ₂(sol)) and water-soluble silicon compound (LPP-WSS)). The obtained phosphors exhibited a broad excitation spectrum ranging from 225 to 450 nm and a strong green emission peak at 502 nm due to the 4f ⁶5d ¹→4f ⁷( ⁸S _7/2) transition of Eu ². The highest luminescent intensity was obtained for the samples fired at 1100 °C. The dependence of luminescence properties on Eu ² concentration for the phosphors synthesized using LPP-WSS method was also examined from 0.1 to 5.0 mol% and the maximum emission intensity was observed at 3.0 mol% Eu ². A detailed analysis using various characterizations revealed that phosphors produced by the LPP-WSS process exhibited more homogenous phase distribution and higher luminescence intensity than those from the other two processes, which suggested the potential application of Ca ₂SiO ₄:Eu ² in white light-emitting diodes and fluorescence lamps.

Original language	English
Pages (from-to)	68-74
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	189
DOIs	https://doi.org/10.1016/j.jssc.2011.11.046
Publication status	Published - 2012 May

Keywords

Eu concentration
Luminescence
Silicate phosphor
Thermal analysis
White LEDs

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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@article{dd42c23452af4c7b9a8d9c6a9319f671,

title = "Synthesis of high efficient Ca 2SiO 4:Eu 2 green emitting phosphor by a liquid phase precursor method",

abstract = "Green emitting Eu 2-doped Ca 2SiO 4 phosphors were synthesized by three different methods (a conventional solid state reaction (SSR) method, a novel liquid phase precursor approach using SiO 2 sol (LPP-SiO 2(sol)) and water-soluble silicon compound (LPP-WSS)). The obtained phosphors exhibited a broad excitation spectrum ranging from 225 to 450 nm and a strong green emission peak at 502 nm due to the 4f 65d 1→4f 7( 8S 7/2) transition of Eu 2. The highest luminescent intensity was obtained for the samples fired at 1100 °C. The dependence of luminescence properties on Eu 2 concentration for the phosphors synthesized using LPP-WSS method was also examined from 0.1 to 5.0 mol% and the maximum emission intensity was observed at 3.0 mol% Eu 2. A detailed analysis using various characterizations revealed that phosphors produced by the LPP-WSS process exhibited more homogenous phase distribution and higher luminescence intensity than those from the other two processes, which suggested the potential application of Ca 2SiO 4:Eu 2 in white light-emitting diodes and fluorescence lamps.",

keywords = "Eu concentration, Luminescence, Silicate phosphor, Thermal analysis, White LEDs",

author = "Luo, {Y. Y.} and Jo, {D. S.} and K. Senthil and S. Tezuka and M. Kakihana and K. Toda and T. Masaki and Yoon, {D. H.}",

note = "Funding Information: This work is financially supported by the Ministry of Education, Science and Technology (MEST), the Ministry of Knowledge Economy (MKE) through the fostering project of the Industrial-Academic Cooperation Centered University.",

year = "2012",

month = may,

doi = "10.1016/j.jssc.2011.11.046",

language = "English",

volume = "189",

pages = "68--74",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Synthesis of high efficient Ca 2SiO 4:Eu 2 green emitting phosphor by a liquid phase precursor method

AU - Luo, Y. Y.

AU - Jo, D. S.

AU - Senthil, K.

AU - Tezuka, S.

AU - Kakihana, M.

AU - Toda, K.

AU - Masaki, T.

AU - Yoon, D. H.

N1 - Funding Information: This work is financially supported by the Ministry of Education, Science and Technology (MEST), the Ministry of Knowledge Economy (MKE) through the fostering project of the Industrial-Academic Cooperation Centered University.

PY - 2012/5

Y1 - 2012/5

N2 - Green emitting Eu 2-doped Ca 2SiO 4 phosphors were synthesized by three different methods (a conventional solid state reaction (SSR) method, a novel liquid phase precursor approach using SiO 2 sol (LPP-SiO 2(sol)) and water-soluble silicon compound (LPP-WSS)). The obtained phosphors exhibited a broad excitation spectrum ranging from 225 to 450 nm and a strong green emission peak at 502 nm due to the 4f 65d 1→4f 7( 8S 7/2) transition of Eu 2. The highest luminescent intensity was obtained for the samples fired at 1100 °C. The dependence of luminescence properties on Eu 2 concentration for the phosphors synthesized using LPP-WSS method was also examined from 0.1 to 5.0 mol% and the maximum emission intensity was observed at 3.0 mol% Eu 2. A detailed analysis using various characterizations revealed that phosphors produced by the LPP-WSS process exhibited more homogenous phase distribution and higher luminescence intensity than those from the other two processes, which suggested the potential application of Ca 2SiO 4:Eu 2 in white light-emitting diodes and fluorescence lamps.

AB - Green emitting Eu 2-doped Ca 2SiO 4 phosphors were synthesized by three different methods (a conventional solid state reaction (SSR) method, a novel liquid phase precursor approach using SiO 2 sol (LPP-SiO 2(sol)) and water-soluble silicon compound (LPP-WSS)). The obtained phosphors exhibited a broad excitation spectrum ranging from 225 to 450 nm and a strong green emission peak at 502 nm due to the 4f 65d 1→4f 7( 8S 7/2) transition of Eu 2. The highest luminescent intensity was obtained for the samples fired at 1100 °C. The dependence of luminescence properties on Eu 2 concentration for the phosphors synthesized using LPP-WSS method was also examined from 0.1 to 5.0 mol% and the maximum emission intensity was observed at 3.0 mol% Eu 2. A detailed analysis using various characterizations revealed that phosphors produced by the LPP-WSS process exhibited more homogenous phase distribution and higher luminescence intensity than those from the other two processes, which suggested the potential application of Ca 2SiO 4:Eu 2 in white light-emitting diodes and fluorescence lamps.

KW - Eu concentration

KW - Luminescence

KW - Silicate phosphor

KW - Thermal analysis

KW - White LEDs

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