近红外量子剪裁能够有效地提高硅太阳能电池的效率.稀土元素种类繁多,能级丰富,常被用于制作近红外量子剪裁发光材料.研究者们用适当的方法制成发光材料之后,测量材料的吸收光谱,激发光谱和发射光谱.根据这些数据计算得到材料的量子效率.其中Tb3+-Yb3+离子对备受关注.Tb3+吸收紫外-可见光,通过协同能量传递把能量传递给Yb3+离子.Yb3+离子跃迁辐射出1000 nm左右的近红外光.该波段的光子能够被硅太阳能电池吸收利用.Tb3+-Yb3+离子对在不同掺杂浓度,不同基质中得到的量子效率不同.
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