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DETAILED ANALYSIS OF FINE LINE PRINTED AND PLATED SOLAR CELL CONTACTS

机译：细线印制和平板太阳能电池触点的详细分析

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摘要

This work presents a detailed analysis of the new two-layer process to contact industrial solar cells. The seedlayer was created by a pad printer and thickened by light-induced plating of silver. These contact structures wereinvestigated microscopically aiming for a better understanding of the observed solar cell results. First we analysed theinfluence of the geometry of the seed-layer on IV-parameter. Next, the dependence of the contact resistance on the width ofthe seed-layer was measured and compared with theoretical expectations. This comparison resulted in the conclusion that thecontact resistivity decreases with a reduction of the seed layer width. These results have been further approved by an analysisof SEM-pictures of wet chemically etched contacts. Contact resistance (R_C) measurements before and after light-inducedplating of silver showed surprisingly a positive influence of the plating process on R_C. A detailed microscopical analysisrevealed four new possible current flow paths due to the light-induced plating of a conventional contact or a seed layer. Theresults led to an extension of the existing model for a screen-printed contact.
机译：这项工作对接触工业太阳能电池的新两层工艺进行了详细分析。种子 该层由移印机产生，并通过光诱导镀银而加厚。这些接触结构是 在显微镜下进行了研究，目的是更好地了解所观察到的太阳能电池结果。首先我们分析了 种子层的几何形状对IV参数的影响。接下来，接触电阻对电极宽度的依赖性 测量种子层并将其与理论预期值进行比较。比较得出的结论是： 接触电阻率随着籽晶层宽度的减小而减小。分析结果进一步证实了这些结果 湿化学腐蚀触点的SEM图片。光感应前后的接触电阻（R_C）测量 银的电镀惊人地显示出电镀工艺对R_C的积极影响。详细的微观分析 揭示了由于常规触点或种子层的光感应镀覆而产生的四个新的可能电流路径。这 结果导致对丝网印刷联系人的现有模型进行了扩展。

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