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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Textured conducting glass by nanosphere lithography for increased light absorption in thin-film solar cells
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Textured conducting glass by nanosphere lithography for increased light absorption in thin-film solar cells

机译：通过纳米球光刻技术制成的带纹理的导电玻璃可提高薄膜太阳能电池的光吸收

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Nanoscale surface texturing in thin-film solar cells has been shown to enhance device efficiency by increasing light absorption through reduced reflectance and increased light scattering across a broad range of wavelengths and angles. However, light trapping in the industrial thin-film cells is still sub-optimal and creating optimized nanoscale texture over a large area remains challenging. In this article, we present a well-controlled low-cost process to fabricate a periodic nanocone texture optimized for maximum light absorption in thin-film microcrystalline silicon solar cells. The texture is fabricated using nanosphere lithography with the period controlled by the nanosphere diameter and the texture shape and aspect ratio controlled by the reactive ion etching conditions. Finite-difference time-domain optical simulations are used to optimize the texture in the state-of-the-art microcrystalline cells, and optical absorption measurements show that the same cells fabricated on the optimized nanocone-textured substrates exhibit a relative short-circuit current increase of close to 30% compared to a reference state-of-the-art cell with a randomly textured zinc oxide layer. This nanocone texturing technique is compatible with standard thin-film cell fabrication processes and can also be used for other thin-film cells (CIGS, CdTe, CZTS, etc) to maximize light absorption and minimize layer thickness enabling more efficient carrier collection and lower overall cost.
机译：薄膜太阳能电池中的纳米级表面纹理化已显示出可通过在较宽的波长和角度范围内降低反射率和增加光散射来增加光吸收，从而提高器件效率。然而，工业薄膜电池中的光捕获仍然不是最理想的，并且在大面积上创建优化的纳米级纹理仍然具有挑战性。在本文中，我们提出了一种可控的低成本工艺，以制造周期性的纳米锥纹理，该纹理经过优化，可最大限度地吸收薄膜微晶硅太阳能电池中的光。使用纳米球光刻技术制造纹理，其周期由纳米球直径控制，纹理形状和纵横比由反应性离子蚀刻条件控制。有限差分时域光学模拟用于优化最新微晶电池的织构，光学吸收测量结果表明，在优化的纳米锥织构衬底上制造的相同电池表现出相对的短路电流与具有随机织构的氧化锌层的参考最新型电池相比，其性能提高了近30％。这种纳米锥纹理化技术与标准的薄膜电池制造工艺兼容，还可以用于其他薄膜电池（CIGS，CdTe，CZTS等），以最大化吸收光并最小化层厚度，从而实现更有效的载流子收集并降低总体成本。

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