- 期刊
冶金級矽之純化與太陽能電池之應用
Purification of Metallurgical Silicon Materials for Solar Cell Application
摘要
多晶矽與單晶矽在太陽能電池之使用上十分普遍，而大部分的矽原料來自於西門子法製程，爲了降低矽晶太陽能電池的生產成本，冶金級矽(metallurgical grade Si)的使用是一個可行的方向，由於矽晶片的品質直接受到其雜質含量與缺陷密度的影響，因此冶金級矽的研究重點在於如何妥善的處理雜質問題。冶金級矽的純度約2N(99%)，雜質含量頗高，一般使用前必須先經過粉碎酸洗、熔煉處理、單向凝固後，得到5N(99.999%)純度以上的多晶矽材，再拿來作多晶矽生長原料使用。生長完畢的多晶矽錠切割成晶片後，如果仍有金屬雜質殘留，可使用後續的吸雜技術來達到移除殘餘雜質的目的，來得到足夠的能量轉換效率。
並列摘要
The metallurgical grade silicon could be used for solar cell fabrication, and the most important factor is the contained impurity. The 2N raw material have to purified to 5N by acid etching, smelting treatment, and directional solidification, and the purified material was used for crystal growth through casting method. The grown ingot was then sliced into wafers and used for solar cell fabrication. Sometimes for propose of removing the residual metal impurities in the wafer, gettering treatment was used to remove the impurities.
延伸閱讀
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