8纳米稀土掺杂氟化物纳米颗粒的制备及上转换发光
Preparation and up-conversion luminescence of 8 nm rare-earth doped fluoride nanoparticles.
作者信息
Tikhomirov V K, Mortier M, Gredin P, Patriarche G, Görller-Walrand C, Moshchalkov V V
机构信息
INPAC-Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Belgium.
出版信息
Opt Express. 2008 Sep 15;16(19):14544-9. doi: 10.1364/oe.16.014544.
Free-standing, 8 nm diameter, rare-earth doped nanoparticles Re(10)Pb(25)F(65) have been prepared, where Re stands for either single rare-earth ion, such as Er(3+), Yb(3+), Eu(3+), Dy(3+), Ho(3+), Tm(3+) or combinations of those ions. The nanoparticles have been extracted by chemical etching from the oxyfluoride nano-glass-ceramics template and analyzed by transmission electron microscope with energy dispersion spectroscopy. The nanoparticles show durable up-conversion photoluminescence, which is neither concentration nor impurity quenched after 6 months ageing in ambient atmosphere. High doping levels in these nanoparticles ensure high, up to 15%, quantum yield of up-conversion luminescence.
已制备出直径为8纳米的独立式稀土掺杂纳米颗粒Re(10)Pb(25)F(65)，其中Re代表单一稀土离子，如Er(3+)、Yb(3+)、Eu(3+)、Dy(3+)、Ho(3+)、Tm(3+)，或这些离子的组合。这些纳米颗粒已通过化学蚀刻从氟氧化物纳米玻璃陶瓷模板中提取出来，并通过带有能量色散光谱的透射电子显微镜进行分析。这些纳米颗粒表现出持久的上转换光致发光，在大气环境中老化6个月后，其发光既没有浓度猝灭也没有杂质猝灭。这些纳米颗粒中的高掺杂水平确保了高达15%的上转换发光量子产率。
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