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-Feb-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: 
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