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论文类型：期刊论文

发表时间：2015-05-01

发表刊物：RENEWABLE ENERGY

收录刊物：SCIE、EI、Scopus

卷号：77

页面范围：463-466

ISSN号：0960-1481

关键字：Solar energy materials; Hollow silicon ingot; Solid-liquid separation; Fountain effect; Back diffusion

摘要：A hollow silicon ingot was obtained by a solid liquid separation method inducted by the fountain effect and the formation mechanism of the ingot was also discussed. A layer of solidified shell was formed on the melt surface and the gas dissolved in the melt was separated out. Because of this, the thickness of the shell was gradually increased and expanded due to the sudden change of the chamber pressure leading to the silicon melt being squeezed out from the preset hole of the shell. During this process, the melt left behind contains a high concentration of impurities and can be separated or detached completely from the decontaminated solid. This novel approach has of great potential to inhibit the back diffusion of impurities and to produce a silicon ingot at a high yield rate. (c) 2014 Elsevier Ltd. All rights reserved.