A Method to Quantify the Collective Impact of Grain Boundaries on the Internal Quantum Efficiency of Multicrystalline Silicon Solar Cells,Physica Status Solidi (A) - Applications and Materials Science

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A Method to Quantify the Collective Impact of Grain Boundaries on the Internal Quantum Efficiency of Multicrystalline Silicon Solar Cells
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2020-07-02 , DOI: 10.1002/pssa.202000229
Aleo Paolo Pacho ₁ , Markus Rinio ₁

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Herein, a method to quantify the amount of reduction in the internal quantum efficiency (IQE) of multicrystalline silicon solar cells that can be attributed to grain boundaries is presented. By correlating the IQE maps obtained via light beam induced current (LBIC) topography with optical images of Secco‐etched samples, the distribution of IQE values at the positions of grain boundaries can be compared with the distribution of IQE values for all other positions where other defects may exist. The segmentation of IQE at 826 nm maps of the samples shows grain boundaries to be more detrimental compared with the combined effects of all other defects that may exist in other regions of the cell. The grain boundaries reduce the average IQE by up to 4.07% absolute for the cell from the bottom of the ingot.

中文翻译：

一种量化晶界对多晶硅太阳能电池内部量子效率的集体影响的方法

在此，提出了一种量化可以归因于晶界的多晶硅太阳能电池的内部量子效率（IQE）的降低量的方法。通过将通过光束感应电流（LBIC）形貌获得的IQE图与Secco蚀刻样品的光学图像相关联，可以将晶界位置的IQE值分布与所有其他位置的IQE值分布进行比较。可能存在缺陷。样品在826 nm处的IQE分割显示，与晶胞其他区域中可能存在的所有其他缺陷的综合作用相比，晶界更有害。从晶锭底部开始，晶界使单元的平均IQE降低了高达4.07％的绝对值。

更新日期：2020-07-02

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