Changchun Institute of Optics,Fine Mechanics and Physics,CAS
One-phonon sideband and multiphonon relaxation in La1.6Mo2O9: Eu-0.4(3+) and beta-NaGdF4: Tb3+ nanocrystals | |
Liu, C. X.; J. S. Zhang and Y. S. Luo | |
2015 | |
发表期刊 | Rsc Advances |
卷号 | 5期号:22页码:17300-17307 |
摘要 | The experimental studies of one-phonon sideband (PSB) and multiphonon relaxation (MR), involving a large energy gap (5800 cm(-1)) crossover from bulk to a nanocrystal (NC) system are reported. Two one-phonon sidebands, PSB1 = 449 nm and PSB2 = 429 nm associated with the Eu3+ F-7(0) --> D-5(2) 464 nm zero phonon line (ZPL), were observed in the excitation spectra monitoring Eu3+ D-5(0) --> F-7(2) at 613 nm, which resulted from Mo-O and O-Mo-O local mode vibrations, respectively. The phonon densities of states of rho(omega) were determined from the profile of PSB. The temperature dependence of MR rate for the Tb3+ D-5(3) --> D-5(4) in beta-NaGdF4:Tb3+ NCs was analyzed in a single-frequency approximation of the phonon spectrum in the framework of the nonlinear theory of MR. The experimental data were in good agreement with the theoretical curves within the range of 12 K to 312 K. It is concluded that the MR occurs predominantly via high-energy optical phonons. |
收录类别 | SCI |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/55331 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Liu, C. X.,J. S. Zhang and Y. S. Luo. One-phonon sideband and multiphonon relaxation in La1.6Mo2O9: Eu-0.4(3+) and beta-NaGdF4: Tb3+ nanocrystals[J]. Rsc Advances,2015,5(22):17300-17307. |
APA | Liu, C. X.,&J. S. Zhang and Y. S. Luo.(2015).One-phonon sideband and multiphonon relaxation in La1.6Mo2O9: Eu-0.4(3+) and beta-NaGdF4: Tb3+ nanocrystals.Rsc Advances,5(22),17300-17307. |
MLA | Liu, C. X.,et al."One-phonon sideband and multiphonon relaxation in La1.6Mo2O9: Eu-0.4(3+) and beta-NaGdF4: Tb3+ nanocrystals".Rsc Advances 5.22(2015):17300-17307. |
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