稀土离子掺杂对人工翡翠宝石荧光性质的影响

FLUORESCENCE OF RARE EARTH IONS IN SYNTHETIC JADEITE GEM

在具有翡翠成份的原料中掺入0.01～0.1mol的Eu_2O_3、Dy_2O_3、CeO_2,经商温高压合成,分别茯得可发红、黄、紫色可见荧光的翡翠宝石。由于翡翠非对称晶场的作用,Eu^(3+)的电偶极跃迁~5D_0→~7F_2成为发光主峰,Dy^(3+)的发光峰出现明显劈裂,增大Ce^(3+)的掺杂量,出现浓度猝灭现象。

A jadeite gem having visible emission (red, yellow, violet) has been synthesized by doping Eu_2O_3, Dy_2O_3, CeO_2 of 0.01-0.1 mol under high pressure and high temperature. Their emission spectra were determined. Because of the non-symmetry crystal field in jadeite, the electric dipole transition ~5D_0→~7F_2 of Eu^(3+) becomes major emission; and the luminescence peaks of Dy^(3+) split. With the increasing of the amount of Ce^(3+), the concentration quenching effect occurs.