Excited-state dynamics of Er3+ in Gd2O3 nanocrystals
文献类型：期刊论文
| 作者 | X. Y. Chen ; E. Ma ; G. K. Liu ; M. Yin |
| 刊名 | Journal of Physical Chemistry C
 |
| 出版日期 | 2007-07 |
| 卷号 | 111期号:27页码:9638-9643 |
| 关键词 | rare-earth ions visible up-conversion vibronic transitions lanthanide ions mccumber theory luminescence absorption emission crystals nanoparticles |
| ISSN号 | 1932-7447 |
| 中文摘要 | The temperature-dependent lifetime of the green emission from Er3+ ions in 40-50 nm Gd2O3 nanocrystals has been measured and analyzed. The luminescence decay from the S-4(3/2) state of Er3+ shows nonexponential characteristics when excited directly to the thermally coupled H-2(11/2) from 10 to 300 K, indicating energy transfer to defects in the nanocrystals. The intrinsic lifetime of the S-4(3/2) state was determined by utilizing the efficient energy transfer from Gd3+ to Er3+. It is shown that, on the basis of a simplified thermalization model, multiphonon nonradiative relaxation from S-4(3/2) to F-4(9/2) plays a leading role in the observed temperature dependence of the intrinsic lifetime. Furthermore, a reciprocity method has been successfully extended to the calculation of the room-temperature emission spectrum of the H-2(11/2)-I-4(15/2) transition according to the measured excitation spectrum. Unusual phonon side bands in the laser excitation spectrum are observed in the hypersensitive transitions of Er3+. The origin of the phonon side bands is ascribed to the M process that involves the infrared-active lattice modes. |
| 语种 | 英语 |
| 公开日期 | 2013-04-01 |
| 源URL | [http://ir.fjirsm.ac.cn/handle/350002/6179]  |
| 专题 | 福建物质结构研究所_中科院福建物质结构研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | X. Y. Chen,E. Ma,G. K. Liu,et al. Excited-state dynamics of Er3+ in Gd2O3 nanocrystals[J]. Journal of Physical Chemistry C,2007,111(27):9638-9643. |
| APA | X. Y. Chen,E. Ma,G. K. Liu,&M. Yin.(2007).Excited-state dynamics of Er3+ in Gd2O3 nanocrystals.Journal of Physical Chemistry C,111(27),9638-9643. |
| MLA | X. Y. Chen,et al."Excited-state dynamics of Er3+ in Gd2O3 nanocrystals".Journal of Physical Chemistry C 111.27(2007):9638-9643. |
入库方式： OAI收割
来源：福建物质结构研究所
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