中文摘要：

报道了一种新的上转换发光材料X2型Y2SiO5：Er，Yb并研究了Yb^3＋浓度和泵浦功率对样品的上转换发光特性的影响：（1）随着Yb^3＋浓度的增加，绿、红光发射均呈先增强后减弱的变化，但相对于绿光发射，红光发射受Yb^3＋浓度的影响更剧烈，并且当12％（摩尔分数）Yb^3＋时，可以得到很纯的红光发射；（2）上转换发光强度与泵浦功率的关系表明，双光子吸收贡献样品的上转换发射。此外，讨论了可能的上转换机制。认为随着Yb^3＋浓度增加，Er^3＋的激发态吸收、Yb^3＋到Er^3＋的能量传递和Er^3＋的交叉弛豫对上转换发光的作用依次逐渐加强。

英文摘要：

In this paper, a new upconversion luminescence material X2 type Y2SiO5： Yb, Er was reported. The upconversion luminescent properties as a function of Yb^3＋ concentration and pumping power were were studied. （1）As Yb^3＋ concentration increased, both the green and red light increased first, and then decreased. Howev- er, compared with the green light emission, the red depended on Yb^3＋ concentration more strongly, and pure red light emission was obtained when Yb^3＋ concentration was 12mol%. （2）The relationship between the upeonversion intensity and pumping power indicated that the upconversion emission based on two-photon absorption. Moreover the mechanisms of upconversion luminescence were studied. It was considerered that as Yb^3＋ concentration increased, the effects of the excited state absorption of Er^3＋ , energy transfer from Yb^3＋ to Er^3＋ and cross-relaxation of Er^3＋ on the upconversion luminescence gradually enhanced in turn.