Designing periodic arrays of metal nanoparticles for light-trapping applications in solar cells
Designing periodic arrays of metal nanoparticles for light-trapping applications in solar cells
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DOI：
10.1063/1.3200948
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发表时间：
2009-08-03
影响因子：
4
通讯作者：
Catchpole, K. R.
中科院分区：
文献类型：
--
作者：
Mokkapati, S.;Beck, F. J.;Catchpole, K. R.
我们提出的标准优化的光捕获效率的周期性阵列的金属纳米粒子的硅太阳能电池的应用。纳米颗粒的散射截面和光栅的衍射效率应在长波长范围内最大化。光栅节距应被选择为允许用于长波长的更高阶衍射模式，同时保持最高可能的填充因子。这些条件对金属纳米颗粒的周期性阵列的最佳参数（类似于200 nm的颗粒尺寸和类似于400 nm的间距）施加了强约束，与介电光栅相反，介电光栅中相对宽范围的周期和特征尺寸可以用于有效的光捕获。
We present criteria for optimizing the light-trapping efficiency of periodic arrays of metal nanoparticles for Si solar cell applications. The scattering cross section of the nanoparticles and the diffraction efficiency of the grating should be maximized in the long wavelength range. The grating pitch should be chosen to allow higher order diffraction modes for long wavelengths while maintaining the highest possible fill factor. These conditions place strong constraints on the optimal parameters (particle size of similar to 200 nm and pitch of similar to 400 nm) for periodic arrays of metal nanoparticles, in contrast to dielectric gratings, where a relatively wide range of periods and feature sizes can be used for efficient light trapping.