現行多晶矽網印太陽能電池於量產時，常會有部分產品因導電漿料與矽材料的燒結不完導致降低轉換效率，造成生產線良率降低。因此如何改善這些瑕疵品使其轉換效率再提升，成為目前產業界極欲解決的課題。
本論文報導利用高溫燒結爐(Centrotherm公司model DO-FF-8.600-300)及組合12組不同溫度及傳送速度對瑕疵品進行二次燒結的研究。目的在降低串聯電阻Rs，改善金屬接觸及填充因子(Fill Factor)，藉以提升轉換效率。
吾人利用效率量測儀器(Berger Flasher System)、光致電流檢測儀(Light Beam Induced Current System)、接觸電阻量測儀(Contact Resistance Mapping System : Core-scan)、量子效率測試儀(Quantum Efficiency System)、掃瞄式電子顯微鏡(SEM)等儀器來探討二次燒結後太陽能電池的轉換效率、串聯電阻(Rs)、填充因子(Fill Factor)等重要電性參數之變化。
實驗顯示，以溫度在850℃且傳送速度在6800mm/min時可獲得較佳的結果；約 90% 的次級品，其串聯電阻約降低17mΩ，填充因子約增加20%及提昇4%的轉換效率。此外，二次燒結製程後之太陽能電池外觀，並無任何缺陷產生，成功的改良這些瑕疵品使生產線良率提升。

Currently, the major issue in mass production for the screen printing polysilicon solar cell is the incompletely paste sintering in firing process caused lower conversion efficiency. Thus, how to recover the efficiency of these inferior cells to promote yield becomes the necessary and urgent.
In this work, we used a commercial high-temperature firing furnace system (Centrotherm Co model DO-FF-8.600-300) with various sintering conditions to implement a best 2nd firing process to reduce series resistance, improving the top metal contact and fill factor for promotion of efficiency. Besides, we analyzed the cells after the 2nd firing using Berger system, LBIC, Core-scan, QE system and SEM for measuring efficiency, Rs, Fill Factor and morphology analyzing , respectively.
Experimental results show the best 2nd firing process is under 850oC and 6800mm/min of the conveyer speed. With the 2nd firing process, almost 90% of the inferior cells can reduce Rs 17Ω，increase of 20% Fill Factor, and thus promoting 4% efficiency. Besides, the 2nd firing process doesn't harm any appearance of the cell.

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