Abstract In this study, a new method to reduce the thermomechanical stress in silicon solar cells induced during the cell interconnection process is proposed. By repositioning the rear pads such that the silicon solar cells are bonded to the front copper conductors ended at the same locations as the outer edges of the outermost rear pads along the busbar direction. Finite element modelling predicts that stress reduction of >50% was achieved when solar cells are interconnected by conventional tabbing or Multi-busbars (MBB) and it was confirmed by the derived stress measured by the micro-Raman spectroscopy. Front busbars terminated with a reduced contact area can further increase the tolerance of any potential misalignment arising from process variations.

中文翻译：

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平衡接触法：减少互连引起的硅太阳能电池中的热机械应力

摘要 在这项研究中，提出了一种降低硅太阳能电池在电池互连过程中产生的热机械应力的新方法。通过重新定位后焊盘，使得硅太阳能电池接合到在与最外后焊盘的外边缘相同的位置处沿着母线方向终止的前铜导体。有限元模型预测，当太阳能电池通过传统的搭扣或多母线 (MBB) 互连时，应力降低了 >50%，并且由微拉曼光谱测量的衍生应力证实了这一点。以减少的接触面积终止的前母线可以进一步增加对因工艺变化引起的任何潜在错位的容忍度。