Abstract
Industrial applicable fine-line double printing and nickel plating method was applied to single crystalline silicon (c-Si) solar cells. As the finger widths decreased, the efficiency and short circuit current density (JSC) linearly increased. Although the increase of the JSC was caused by the reduction of shadowing loss due to the decrease of finger width, the fill factor (FF) was slowly decreased due to increase of contact resistance. The FF of the cells using the fine line was enhanced by using a double printing and nickel plating. c-Si solar cells with the dimensions of 12.5cm×12.5cm, double printed finger width of 50μm due to spreadability of paste, a finger spacing of 2.4μm, and aluminum back surface field were fabricated, achieving an increase of JSC and efficiencies of up to about 0.62mA/cm2 and 0.38% compared to a reference cell at 79.8% of the FF, respectively.
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