Study on Purification of Solar Grade Polysilicon

Abstract:

To introduce the productive technology and purification method of the domestic and overseas solar grade polysilicon. We will combine with the directional solidification and vacuum melting, select the appropriate technological parameter and use the U.S. GT polysilicon ingot furnace in the solar grade polysilicon preparation. In the growth of the ingot, cut the top, the second and the lowest impurities deposited layer, leaving the middle of the good parts to wait for slice. Meanwhile, we can observe purification effect through SEM and EDS experiment. The results show that the combination of the purification process of directional solidification and vacuum melting method can effectively purify solar grade polysilicon.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 1099-1102
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.1099
• Online since: December 2012
• Authors: Jian Xiu Liu, Hui Qiu
• Keywords: Polysilicon Ingot Furnace, Purification, Solar Grade Polysilicon

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