標題: | Investigation of Pr(3+) as a sensitizer in quantum-cutting fluoride phosphors |
作者: | Lee, Te-Ju Luo, Li-Yang Cheng, Bing-Ming Diau, Wei-Guang Chen, Teng-Ming 應用化學系 Department of Applied Chemistry |
公開日期: | 25-二月-2008 |
摘要: | A quantum-cutting (QC) phosphor K(2)GdF(5):Eu(3+) shows poor optical absorption and a theoretical quantum efficiency (QE) of 107% in the ultraviolet (UV) and vacuum ultraviolet (VUV) excitation spectral ranges. Pr(3+) was codoped as a sensitizer in K(2)GdF(5): Eu(3+) thus increasing the absorption in the UV and VUV spectral regions; the theoretical QE of K(2)GdF(5): Eu(3+), Pr(3+) was increased to 138%. The spectra indicate that the possible mechanisms of QC and energy transfer differ from those of phosphors containing the Gd(3+) -Eu(3+) couple. Temporally resolved measurements of fluorescence decay confirm the proposed QC mechanism for the phosphor containing the Gd(3+) -Eu(3+),Pr(3+) system. (C) 2008 American Institute of Physics. |
URI: | http://dx.doi.org/10.1063/1.2884690 http://hdl.handle.net/11536/9655 |
ISSN: | 0003-6951 |
DOI: | 10.1063/1.2884690 |
期刊: | APPLIED PHYSICS LETTERS |
Volume: | 92 |
Issue: | 8 |
結束頁: | |
顯示於類別: | 期刊論文 |