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首页> 外文会议>IEEE Photovoltaic Specialists Conference >Efficiency enhancement in Cu2ZnSnS4 solar cells with silica nanoparticles embedded in absorber layer
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Efficiency enhancement in Cu2ZnSnS4 solar cells with silica nanoparticles embedded in absorber layer

机译：二氧化硅纳米粒子嵌入吸收层中提高Cu2ZnSnS4太阳能电池的效率

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Light trapping is essential to lower transmission losses in thin-film solar cells, particularly for wavelengths where the absorption is inefficient. We have embedded silica nanoparticles into a CZTS absorber layer resulting in localized as well as scattering field enhancement. UV-Vis absorption measurements show position (depth in the absorber layer) dependent improvement in the optical absorption with incorporation of silica nanoparticles; this has been explained using finite-difference-time-domain (FDTD) calculations of Mie scattering. The optical enhancement in turn leads to efficiency improvement as seen from electrical measurements; this has a slightly different position dependence that can also be understood theoretically. We observe maximal efficiency improvement, of about 21% compared to devices without nanoparticles (reference cell efficiency ~ 4.13% and for particles at middle ~ 5%), when nanoparticles are placed at the middle of the absorber layer.
机译：陷光对于降低薄膜太阳能电池的传输损耗至关重要，尤其是对于吸收效率低的波长而言。我们将二氧化硅纳米颗粒嵌入CZTS吸收层中，从而增强了局部散射场。 UV-Vis吸收测量结果表明，掺入二氧化硅纳米颗粒后，光吸收的位置（吸收层的深度）得到了改善。这已经使用米氏散射的有限差分时域（FDTD）计算进行了解释。从电学测量来看，光学增强反过来又导致效率提高。这具有稍微不同的位置依赖性，这在理论上也可以理解。当将纳米颗粒放置在吸收层的中间时，我们观察到与不使用纳米颗粒的设备相比，最大效率提高了约21％（参考电池效率为4.13％，中间颗粒为5％）。

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