Development of silicon purification by strong radiation catalysis method

doi:10.1088/1674-1056/19/11/118105

Abstract Using a new type of solar furnace and a specially designed induction furnace，cost effective and highly efficient purification of metallurgical silicon into solar grade silicon can be achieved. It is realized by a new method for extracting boron from silicon with the aid of photo-chemical effect. In this article, we discussed the postulated principle of strong radiation catalysis and the recent development in practice. Starting from ordinary metallurgical silicon, we achieved a purification result of 0.12 ppmw to 0.3 ppmw of boron impurity in silicon by only single pass of a low cost and simple process, the major obstacle to make `cheap' solar grade silicon feedstock in industry is thus removed.

Keywords: silicon purification strong radiation catalysis boron removal solar furnace

Accepted manuscript online:

PACS:	82.50.-m	(Photochemistry)
	89.20.Bb	(Industrial and technological research and development)

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Chen Ying-Tian(陈应天), Ho Tso-Hsiu(何祚庥), Lim Chern-Sing(林晨星), and Lim Boon Han(林文汉) Development of silicon purification by strong radiation catalysis method 2010 Chin. Phys. B 19 118105

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Development of silicon purification by strong radiation catalysis method

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