Characterization of Ca2SiO4:Eu2+ Phosphors Synthesized by Polymeric Precursor Process |
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| Authors: | Sung-Woo Choi Seong-Hyeon Hong Young Jin Kim |
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| Affiliation: | Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea;
Department of Materials Science &Engineering, Kyonggi University, Suwon 443-760, Korea |
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| Abstract: | The green emitting Ca2SiO4:Eu2+ (C2S:Eu) phosphors were synthesized by the polymeric precursor process (Pechini-type), and the effects of calcination temperature and europium (Eu) doping concentration on the luminescent properties were investigated. The crystalline β-C2S was obtained in the calcination temperature of 1100°–1400°C, and Eu was reduced into Eu2+ by annealing in 5% H2/N2 atmosphere. The obtained C2S:Eu2+ phosphors exhibited a strong emission at 504 nm under the excitation of λexc=350 nm. The highest photoluminescence (PL) intensity was observed in the C2S:Eu2+ phosphors either calcined at 1300°C or doped with 3 mol% Eu. The obtained PL properties were discussed in terms of crystal structure, particle size and shape, surface roughness, and effect of concentration quenching. |
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