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首页> 外文期刊>Optical Materials >Influence of rare earth elements (Sc, La, Gd and Lu) on the luminescent properties of green phosphor Y_2SiO_5:Ce,Tb
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Influence of rare earth elements (Sc, La, Gd and Lu) on the luminescent properties of green phosphor Y_2SiO_5:Ce,Tb

机译：稀土元素（Sc，La，Gd和Lu）对绿色荧光粉Y_2SiO_5：Ce，Tb发光性能的影响

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摘要

Systematic studies on CL and PL for rare earths (Sc~(3+), La~(3+), Gd~(3+) and Lu~(3+)) doped Y_2SiO_5:Ce,Tb phosphor were performed and the formula (Y_(0.965-x)R_xTb_(0.03)Ce_(0.005))_2SiO_5 (R = Sc, La, Gd and Lu) was applied to represent the compositions of the samples. Sensitizing influence of Ce~(3+) on Tb~(3+) can only be observed with the excitation of cathode rays and 355 nm UV. For the La~(3+) doped system, the PL intensity increased nearly 30% at x = 0.03; and for the Lu~(3+) doped system, the intensity increased about 20% at x = 0.20. Whereas doping of the Gd~(3+) and the Sc~(3+) reduced the intensity: at x = 0.3, the PL intensity decreased 10% for the Gd~(3+) doped system and about 25% for Sc~(3+). CL measurements showed that except the Sc~(3+), other rare earths doping improved the intensities: the La~(3+) doping made the intensity enhancement of about 10% at x = 0.03; the Gd~(3+) 35% at x = 0.1-0.3 and Lu~(3+) 25% at x = 0.1-0.2. For the Sc~(3+) doped samples, the CL intensity decreased about 25% at x = 0.2. The energy transfer processes were discussed for the Gd~(3+) doped samples. Two transfer processes from the Gd~(3+) to the Tb~(3+) were proposed: Gd~(3+) → Tb~(3+) and Gd~(3+) → Ce~(3+) → Tb~(3+).
机译：对稀土掺杂的Y_2SiO_5：Ce，Tb荧光粉（Sc〜（3 +），La〜（3 +），Gd〜（3+）和Lu〜（3+））的CL和PL进行了系统研究。 （Y_（0.965-x）R_xTb_（0.03）Ce_（0.005））_ 2SiO_5（R = Sc，La，Gd和Lu）用于表示样品的组成。 Ce〜（3+）对Tb〜（3+）的增感作用只有在阴极射线和355 nm UV激发下才能观察到。对于La〜（3+）掺杂系统，在x = 0.03时，PL强度增加了近30％。对于Lu〜（3+）掺杂系统，在x = 0.20时强度增加约20％。而Gd〜（3+）和Sc〜（3+）的掺杂降低了强度：在x = 0.3时，Gd〜（3+）掺杂的PL强度降低了10％，Sc〜降低了25％。 （3+）。 CL测量表明，除了Sc〜（3+）外，其他稀土元素掺杂均提高了强度：La〜（3+）掺杂使得x = 0.03时强度提高了约10％。在x = 0.1-0.3时，Gd〜（3+）为35％，在x = 0.1-0.2时，Lu〜（3+）为25％。对于掺杂了Sc〜（3+）的样品，在x = 0.2时，CL强度降低了约25％。讨论了Gd〜（3+）掺杂样品的能量转移过程。提出了从Gd〜（3+）到Tb〜（3+）的两种转移过程：Gd〜（3+）→Tb〜（3+）和Gd〜（3+）→Ce〜（3+）→ Tb〜（3+）。

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