TY - JOUR
T1 - Microstructure and photoluminescent properties of Sr 2SiO 4:Eu 3+ phosphors with various NH 4Cl flux concentrations
AU - Chen, Huang Yu
AU - Yang, Ru Yuan
AU - Chang, Shoou Jinn
AU - Yang, Yu Kai
N1 - Funding Information:
The authors would like to acknowledge funding support from the Nation Science Council of Taiwan under Grant NSC 99-2622-E-020-008-CC2 , and would also like to acknowledge National Nano Device Laboratories and the Precision Instrument Center of National Pingtung University of Science and Technology for supporting the experimental equipment.
PY - 2012/6
Y1 - 2012/6
N2 - In this paper, effect of NH 4Cl flux concentrations (0, 1, 2, 3 and 4 wt%) on the crystal structure, morphology and photoluminescent properties of Sr 2SiO 4:Eu 3+ phosphors synthesized by a microwave sintering at 1200°C for 1 h was investigated and discussed. X-ray powder diffraction analysis showed the crystal structure was not affected and the pure Sr 2SiO 4 phase was formed without second phase or phases of starting materials when adding with the NH 4Cl flux. The SEM images indicated that increase of the NH 4Cl flux enlarged the particle size of the phosphor particles. The photo-luminescence results showed the addition of 1 wt% NH 4Cl flux much improved the emission intensity at λ em of 617 nm as the excitation spectrum at λ ex of 395 nm. The decay times of Sr 2SiO 4:Eu 3+ phosphors with different NH 4Cl flux concentrations were obtained around 2.47-2.52 ms.
AB - In this paper, effect of NH 4Cl flux concentrations (0, 1, 2, 3 and 4 wt%) on the crystal structure, morphology and photoluminescent properties of Sr 2SiO 4:Eu 3+ phosphors synthesized by a microwave sintering at 1200°C for 1 h was investigated and discussed. X-ray powder diffraction analysis showed the crystal structure was not affected and the pure Sr 2SiO 4 phase was formed without second phase or phases of starting materials when adding with the NH 4Cl flux. The SEM images indicated that increase of the NH 4Cl flux enlarged the particle size of the phosphor particles. The photo-luminescence results showed the addition of 1 wt% NH 4Cl flux much improved the emission intensity at λ em of 617 nm as the excitation spectrum at λ ex of 395 nm. The decay times of Sr 2SiO 4:Eu 3+ phosphors with different NH 4Cl flux concentrations were obtained around 2.47-2.52 ms.
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U2 - 10.1016/j.materresbull.2012.02.047
DO - 10.1016/j.materresbull.2012.02.047
M3 - Article
AN - SCOPUS:84862791911
SN - 0025-5408
VL - 47
SP - 1412
EP - 1416
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 6
ER -