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Luminescent properties of LaPO4 : Eu nanoparticles and nanowires
其他题名论文其他题名
Yu L. X.; Song H. W.; Lu S. Z.; Liu Z. X.; Yang L. M.; Kong X. G.
2004
发表期刊Journal of Physical Chemistry B
ISSN1520-6106
卷号108期号:43页码:16697-16702
摘要Nanoparticles (NPs) and nanowires (NWs) as well as micrometer particles (MPs) and micrometer rods (MRs) of LaPO4:Eu phosphors were synthesized by the hydrothermal method. Their luminescent properties, including local symmetry surrounding Eu3+ ions and electronic transition processes, were studied and compared. The results indicated that, in NPs and MPs, Eu3+ occupied only one site, A, while in NWs and MRs, Eu3+ occupied the same site, A, and an additional site, B. Varying from NWs to MRs, the relative emission intensity of Eu3+ ions at site B was reduced. The radiative transition rates of D-5(1)-Sigma(J)(7)F(J) and nonradiative transition rates of D-5(1)-D-5(0) in different powders were obtained by measuring temperature-dependent luminescent dynamics. The results indicated that the radiative transition rate of D-5(1)-Sigma(J)(7)F(J) in NWs increased 1.5-1.8 times over that in NPs, MPs, and MRs, while the nonradiative transition rates had only a little variation. Thereby, the luminescent quantum efficiency (QE) of D-5(1) at 0 K in NPs, NWs, MPs, and MRs was deduced to be 38%, 59%, 49%, and 47%, respectively. The radiative transition rate of D-5(0)-Sigma(J)(7)F(J) in NWs also increased similar to1.5 times. The increase of the radiative electronic transition rate in NWs was attributed to the variation of dipole field caused by the shape anisotropy.
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.ciomp.ac.cn/handle/181722/25076
专题中科院长春光机所知识产出
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Yu L. X.,Song H. W.,Lu S. Z.,et al. Luminescent properties of LaPO4 : Eu nanoparticles and nanowires[J]. Journal of Physical Chemistry B,2004,108(43):16697-16702.
APA Yu L. X.,Song H. W.,Lu S. Z.,Liu Z. X.,Yang L. M.,&Kong X. G..(2004).Luminescent properties of LaPO4 : Eu nanoparticles and nanowires.Journal of Physical Chemistry B,108(43),16697-16702.
MLA Yu L. X.,et al."Luminescent properties of LaPO4 : Eu nanoparticles and nanowires".Journal of Physical Chemistry B 108.43(2004):16697-16702.
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