太陽產業是近年來替代能源的新興產業，因太陽能電池利潤豐厚，許多公司紛紛加入生產行列，由於生產迅速膨脹導致供過於求的情形發生。結至2011年第三季，全球太陽能面版需求為20GW(Giga Watt)，但供給已經超過60GW。供過於求的情形使得各公司財務結構面臨考驗，開始有公司因財務問題紛紛退出太陽能電池製造的舞台。如何有效降低成本又不影響轉換效率，是目前各公司在這樣的時空背景下生存的主要課題。太陽能電池製造業的成本主要來自於矽晶圓價格，但矽晶圓價格隨市場供需決定，無法自行掌控，其次成本來自於導電漿料(Paste)，導電漿料約佔電池製造10%以上成本，如何在轉換效率不變的情形下節省將料用量，就可以有效降低生產成本，讓公司可以在這波太陽能面版的寒冬中生存下來。
以往實驗都是以一次一因子法或是經驗法則，實驗結果並不可靠。本研究利用實驗設計及反應曲面法，找出太陽能電池製程最適參數組合及建構經驗模型，透過系統性的實驗，使實驗結果更可被參考及運用，讓導電漿料可在一定的效率等級下達到最低用量，未來新產品的導入，也可利用經驗模型，在短時間內降低導電漿料用量。透過本研究的結果，可有效降低公司成本，讓公司在不景氣的寒冬中更具競爭力。

Solar industry is one kind of alternative energy industries in the past years. Due to expectedly lucrative benefit, many corporations have made an investment in this industry. Unfortunately, the rapid expansion of production leads to oversupply. At the end of the third quarter of 2011, the global demand of solar cell is 20GW (Giga Watt), but the supply has been more than 60GW. Oversupply situation makes corporations facing financial structure. The serious oversupply problem forces corporations to review and rebuild their financial structure. As a result, some corporations choose to quit solar industry. How to reduce costs effectively without affecting the conversion efficiency is the topic at this moment of the various companies. The greatest cost in solar cell comes from the raw material of silicon prices, but the prices of silicon depend on market supply and demand, which we cannot control. The secondly high cost in solar cell manufacturing is conductive paste (Paste). The cost of conductive paste is more than 10% in the overall cost of manufacturing. It means that reducing the usage of conductive paste under the same conversion efficiency not only can decrease the production costs effectively, but also is the good way to survive in the slump year.
In the past years, experiments were done by One-factor-at-a-time or the rule of thumb, and the results are not reliable. In this study, we used the experimental design and response surface methodology to identify the optimal combination of parameters of the solar cell process and construct the empirical model. The results through systematic experiments are more reliable to be referred to and used, and it also shows that we can achieve the same conversion efficiency using the minimum usage amount of conductive paste. We can also fit the empirical model to any new product, and reduce the amount of conductive paste in a short time. Through the results of this study, companies can effectively reduce the costs and be more competitive in a downturn of solar energy.

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