利用频率选择性光陷的半透明太阳能电池
Semi-Transparent Solar Cell enabled by Frequency Selective Light Trapping
摘要：
我们提出了一种频率选择性光捕获方案，该方案能够创建视觉上更透明且同时更有效的半透明太阳能电池。纳米颗粒散射层和光子堆叠背反射器通过介质内的全内反射产生选择性捕获效应，从而增加IR光的吸收。我们提出了一个强的频率选择性散射层，使用球形二氧化钛纳米粒子的半径为255 nm，面积密度为1.1%，在介质中的折射率为1.5。使用针对该配置的详细的数值模拟，我们发现，可以创建具有12.0% \pm 0.4%的肖克利奎瑟效率、60.2% \pm 1.3%、13.3% \pm 1.3的可见光透明度的半透明硅太阳能电池，该半透明硅太阳能电池在相同效率下比裸硅电池更透明。
英文摘要：
We propose a frequency selective light trapping scheme that enables the creation of more visually-transparent and yet simultaneously more efficient semitransparent solar cells. A nanoparticle scattering layer and photonic stack back reflector create a selective trapping effect by total internal reflection within a medium, increasing absorption of IR light. We propose a strong frequency selective scattering layer using spherical TiO2 nanoparticles with radius of 255 nm and area density of 1.1% in a medium with index of refraction of 1.5. Using detailed numerical simulations for this configuration, we find that it is possible to create a semitransparent silicon solar cell that has a Shockley Queisser efficiency of 12.0%\pm0.4% with a visible transparency of 60.2%\pm1.3%, 13.3%\pm1.3 more visibly-transparent than a bare silicon cell at the same efficiency.
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