硅太阳能电池电磁铸造技术的现状与展望

K. Kaneko, R. Kawamura, T. Misawa
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引用次数: 5

摘要

为了为太阳能电池提供低成本的多晶硅衬底,硅晶体制造技术的电磁铸造(EMC)开发研究已经进行了多年。电磁兼容技术是利用电磁力使熔融金属在不接触坩埚壁的情况下悬浮起来,实现硅材料熔融凝固的新概念。1987年开始了铸造的第一个基础研究,用直径5厘米的小圆截面铸锭,铸锭尺寸逐渐扩大为方形截面铸锭形状。开展了22/spl倍/22 cm/sup 2/横截面铸锭工艺开发研究,并开始了35/spl倍/35 cm/sup 2/横截面铸锭的炉体建设工作。使用电磁兼容铸锭晶体的太阳能电池转换效率在13-14%之间,电磁兼容材料的质量达到了常规模具铸造材料的质量水平。通过电磁兼容技术在提高铸造速度、提高材料质量、扩大铸锭尺寸等方面的改进,有望实现一种低成本铸锭生产的铸造新技术。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Present status and future prospects of electromagnetic casting for silicon solar cells
The development research of electromagnetic casting (EMC) for silicon crystal manufacturing technology has been carried out for years with the purpose of providing low cost multicrystalline silicon substrate for solar cells. The EMC technology is a new concept, in which electromagnetic force is utilized to suspend molten metal without contact to crucible wall for melting and solidification of silicon material. The first fundamental research for casting was begun in 1987 with a small round cross-sectioned ingot of 5 cm diameter, and the ingot size was gradually expanded with a square cross-sectioned ingot shape. The research has been carried out for the development of casting technique with an ingot size of 22/spl times/22 cm/sup 2/ cross section, and the furnace construction for producing a 35/spl times/35 cm/sup 2/ cross sectioned ingot has begun. Solar cell conversion efficiencies using EMC ingot crystals are in the range of 13-14%, and the quality of EMC material reaches within that of conventional mold casting material. By the improvements of higher casting speed, higher material quality and larger ingot size of EMC technology, it is expected that a new casting technique for lower cost ingot production will be realized.
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