| Energy transfer mechanisms in tb(3+), yb(3+) codoped y(2)o(3) downconversion phosphor | |
| Yuan, Jun-Lin1,3; Zeng, Xiao-Yan2,3; Zhao, Jing-Tai1; Zhang, Zhi-Jun1,3; Chen, Hao-Hong1; Yang, Xin-Xin1 | |
| 刊名 | Journal of physics d-applied physics
 |
| 2008-05-21 | |
| 卷号 | 41期号:10页码:6 |
| ISSN号 | 0022-3727 |
| DOI | 10.1088/0022-3727/41/10/105406 |
| 通讯作者 | Zhao, jing-tai(jtzhao@mail.sic.ac.cn) |
| 英文摘要 | Tb(3+) and yb(3+) co-activated luminescent material that can cut one photon of around 483 nm into two nir photons of around 1000 nm could be used as a downconversion luminescent convertor in front of crystalline silicon solar cell panels to reduce thermalization loss of the solar cell. the tb(3+) -> yb(3+) energy transfer mechanisms in the uv-blue region in y(2)o(3) phosphor were studied by pl excitation spectra and time-resolved luminescence, from which the charge transfer mechanism and the cooperative transfer mechanism were identified. tb(3+) ions in the 4f(7)5d(1) state relax down to the (5)d(4) level and cooperatively transfer energy to two yb(3+) ions, which is followed by the emission of two photons (lambda similar to 1000 nm). it was found in the (y(0.79)tb(0.01)yb(0.20))(2)o(3) sample that 37% of the tb(3+) ions at the (5)d(4) level transfer energy to two neighbouring yb(3+) ions by the cooperative energy transfer mechanism tb(3+) ((5)d(4)) -> 2yb(3+) ((2)f(5/2)). unfortunately, the high yb(3+) concentration leads to severe concentration quenching that significantly reduces the external quantum efficiency. moreover, the energy of the tb3+ 4f(7)5d(1) state can also be lost non-radiatively or transferred to the yb3+ (2)f(5/2) state via the charge transfer state tb(4+)-yb(2+). in conclusion, re(3+) (re = ce, pr, tb) with strong absorption in the uv region is not an appropriate sensitizer of tb(3+) in tb(3+)-yb(3+) codoped downconversion phosphor. |
| WOS关键词 | DOWN-CONVERSION ; LUMINESCENCE |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Applied |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000255513600066 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2385365 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhao, Jing-Tai |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Jun-Lin,Zeng, Xiao-Yan,Zhao, Jing-Tai,et al. Energy transfer mechanisms in tb(3+), yb(3+) codoped y(2)o(3) downconversion phosphor[J]. Journal of physics d-applied physics,2008,41(10):6. |
| APA | Yuan, Jun-Lin,Zeng, Xiao-Yan,Zhao, Jing-Tai,Zhang, Zhi-Jun,Chen, Hao-Hong,&Yang, Xin-Xin.(2008).Energy transfer mechanisms in tb(3+), yb(3+) codoped y(2)o(3) downconversion phosphor.Journal of physics d-applied physics,41(10),6. |
| MLA | Yuan, Jun-Lin,et al."Energy transfer mechanisms in tb(3+), yb(3+) codoped y(2)o(3) downconversion phosphor".Journal of physics d-applied physics 41.10(2008):6. |
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