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Optimization of local contact formation on screen-printed Al2O3 passivated solar cells

机译：丝网印刷的Al2O3钝化太阳能电池上局部接触形成的优化

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摘要

The passivated emitter and rear solar cells (PERC) have been investigated for industrial application in recent years. For PERC cells, the rear side is passivated by dielectric films, whereby the dielectric films are locally opened for contact formation. In screen-printed PERC cells, however, the local contacts suffer from Kirkendall voids and weak BSF layer intensely. In this paper, the influence of different dot contact geometries on the local contact formation of rear passivated solar cells was investigated. Decreasing the contact pitch or increasing the opening size, the presence of voids decreased drastically. Besides, the quality of BSF layer is improved.
机译：近年来，已经对钝化的发射极和后太阳能电池（PERC）进行了工业应用研究。对于PERC电池，背面被电介质膜钝化，从而使电介质膜局部打开以形成接触。但是，在丝网印刷的PERC电池中，局部接触极易出现Kirkendall空隙和薄弱的BSF层。本文研究了不同点接触几何形状对后钝化太阳能电池局部接触形成的影响。减小接触间距或增大开口尺寸，空隙的存在急剧减少。此外，提高了BSF层的质量。

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