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中文摘要：
在980 nm LED激光器激发下,研究了Yb3＋-Er3＋共掺杂的Y2O3,Y2O2S和NaYS2粉末材料的上转换发射特性。比较了Y2O3∶0.20 Yb3＋,0.03Er3＋和Y2O2S∶0.20 Yb3＋,0.03Er3＋以及NaYS2：0.20 Yb3＋,0.03Er3＋粉末样品的上转换发光光谱,探讨了Er3＋上转换发射对基质的依赖性,分析了S2--Yb3＋和S2--Er3＋电荷转移态对Yb3＋-Er3＋间能量传递和能级间跃迁几率的影响,借助于能级图解释了在不同基质中Yb3＋-Er3＋间的能量传递和Er3＋的上转换发光机制。
英文摘要：
Y2O3∶0.20 Yb3＋,0.03Er3＋ and Y2O2S∶0.20 Yb3＋,0.03Er3＋ and NaYS2：0.20 Yb3＋,0.03Er3＋powder samples were synthesized with solid-state and solution reacting methods, respective- ly. The upconversion （UC） emission properties under a continuous-wave semiconductor laser diode excitation at 980 nm were studied. The relationship between UC emission features and the hosts was explored. Effects of the S2- -Yb3 ＋ and S2- -Er3＋ charge transfer state （CTS） on the transfer-energy rate from Yb3 ＋ to Er3 ＋ and the transition rate between the Er3＋ levels were analyzed in details. Fur-hermore, the energy-transfer processes between Yb3 ＋ and Er3 ＋ based on the energy matching conditions and the UC emission mechanism were discussed with schematic energy-level schemes.
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