Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2013-01-01

Journal: Gongneng Cailiao/Journal of Functional Materials

Included Journals: Scopus、ISTIC、PKU

Volume: 44

Issue: SUPPL.2

Page Number: 192-197

ISSN: 10019731

Abstract: In recent years, cast polycrystalline silicon had become a one of major photovoltaic because of its low cost, low energy consumption and less pollution and other advantages and it received wide attention. However, there were a lot of twins in the coarse columnar grain obtained by directional solidification process. We believed that twin was likely to play a leading role on the crystal growth. The vacuum melting furnace and directional solidification furnace which were designed by us were used to refine metallurgical grade silicon (MG-Si) under vacuum conditions. The growth mechanism of parallel twins and small plane dendritic growth mechanisms in casting polycrystalline silicon were analyzed and discussed in detail based on the observation and analysis of directional solidification test of our group and the research in this area of other research institutions at home and abroad.