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。

Near-infrared quantum cutting is a promising approach to enhance the efficiency of silicon solar cells. There are many different kinds of rare earth elements, and each of them has abundant energy levels. Researchers prepare luminescent materials doped with rare earth elements, measure the absorption spectra, excitation spectra and emission spectra of the materials. According to these data, the quantum efficiency of luminescent materials was calculated. The Tb3 +-Yb3 + ion pair drawed people’s attention. Upon excitation of Tb3 + ion with a ultraviolet-visible photon, Yb3 + ion can emit two near-infrared photons around 1000 nm through cooperative energy transfer from Tb3 + ion to Yb3 + ion. The near-infrared photons can be absorbed by silicon solar cells. The quantum efficiency varies from concentration of Tb3 + /Yb3 + ions as well as the matrix of material.