LCMCP UMR 7574 CNRS/UPMC/Chimie ParisTech, Chimie ParisTech, 11 rue Pierre et Marie Curie, 75235 Paris, France.
Phys Chem Chem Phys. 2011 Oct 21;13(39):17453-60. doi: 10.1039/c1cp20725c. Epub 2011 Sep 2.
The synthesis and spectroscopic investigation of Pr(3+):YF(3) nanoparticles with nominal concentration between 0.05% and 5 at% Pr(3+) are reported. Pr(3+) emission in the visible range of the spectrum is investigated at room temperature and at 10 K as well as time resolved spectroscopy as a function of Pr(3+) concentration. The upconverted emission from the orange to the blue region is observed and the time-resolved spectroscopy of the visible emissions is discussed as a function of the doping level. A careful analysis of the decays permits identification of the main energy-transfer mechanisms that determine the population of the excited levels at various times during the decay.
报告了名义浓度在 0.05%至 5%之间的 Pr(3+)：YF(3)纳米粒子的合成和光谱研究。在室温下以及在 10 K 下研究了光谱可见范围内的 Pr(3+)发射，以及作为 Pr(3+)浓度函数的时间分辨光谱。观察到从橙色到蓝色区域的上转换发射，并讨论了可见发射的时间分辨光谱作为掺杂水平的函数。对衰减的仔细分析允许确定在衰减过程中的不同时间确定激发态的粒子数的主要能量转移机制。
