Changchun Institute of Optics,Fine Mechanics and Physics,CAS
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 |
ISSN | 1520-6106 |
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 |
推荐引用方式 GB/T 7714 | 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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