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Analytical model of front texturization effect on silicon solar cell with porous silicon at the backside

机译：正面纹理化对背面多孔硅硅太阳能电池的影响分析模型

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摘要

In this work, we proposed a theoretical model and an analytical solution to the complete set of equations needed for determining the effect of the front surface texturization and the multiple-pass light trapping on the performance of an n~(++)~+/p/p~+ solar cell having a porous multi-layer structure at the backside (p~+ type). The increase in internal quantum efficiency (IQE), contributions of the different cell regions to IQE, enhancement of conversion efficiency, and effects of multiple-pass light trapping and physical parameters of each region were simulated and evaluated in comparison with n~(++)~+/p/p~+ flat solar cells. Overall, the findings revealed that, for the same physical parameters of the different regions of the solar cells, the textured cells have better IQE and better conversion efficiency than the flat ones. The cell conversion efficiency can be improved by 1.25%. This is due to an increase of the light path offered by a textured structure. Moreover, the effect of multiple-pass light trapping on the IQE is more profound at long wavelength range 0.9-1.15 urn. This effect is almost saturated after four passages for both flat and textured cells.
机译：在这项工作中，我们为确定正面纹理化和多次通过光陷阱对n〜（++）/ n〜性能的影响所需的完整方程组提供了理论模型和解析解。 + / p / p- +太阳能电池在背面具有多孔的多层结构（p- +型）。模拟并评估了内部量子效率（IQE）的增加，不同细胞区域对IQE的贡献，转换效率的提高以及每个区域的多次通过光陷阱和物理参数的影响，并与n〜（++）进行了比较）/ n〜+ / p / p〜+平面太阳能电池。总体而言，研究结果表明，对于太阳能电池不同区域的相同物理参数，与扁平电池相比，纹理电池具有更好的IQE和更高的转换效率。电池转换效率可以提高1.25％。这是由于纹理结构提供的光路增加。而且，在0.9-1.15 urn的长波长范围内，多次通过光陷获对IQE的影响更加深远。扁平和纹理细胞经过四次传代后，这种效果几乎达到饱和。

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