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September 2007 Abstract: The removal of impurity phosphorus from metallurgical grade silicon is one of the major problems on purification of metallurgical grade silicon for solar grade silicon preparation... from the molten silicon and concentrated in vapor phase. Key words: metallurgical grade silicon; solar grade silicon; refining; vacuum distillation; thermodynamics; phosphorus removal1 Introduction......
) completely. Key words: metallurgical grade silicon; solar grade silicon; vacuum distillation; kinetics; phosphorus removal1 Introduction Since solar cell was invented in Bell-lab, silicon... the physiochemical properties of silicon materials. Phosphorus is one of the impurities that are difficult to remove, and the required maximum limit for phosphorus content is 0.1×10-6 for solar grade silicon (SOG......
, the supply of solar grade silicon is short of demand and the new technique of production and purification with large scale and low price must be explored. The purification of metallurgical grade silicon... segregation coefficient can be separated from silicon by the directional solidification[4]. B and P contents in silicon materials will affect the conversion efficiency of solar grade cells. Phosphorus......
得广泛的关注,但目前其产品达不到太阳能级硅的质量要求.展望未来,西门子法仍将是生产高纯度多晶硅的主流技术. 关键词:太阳能级多晶硅;西门子法;硅烷;硅 中图分类号:O 613.72 文献标识码:A Development status and prospect of solar grade silicon production... silicon and development studies of its new representative processes and technologies were comprehensively introduced. The production technologies of solar grade silicon mostly include Simens process......
method for production of solar grade silicon(SoG-Si) at low cost from metallurgical grade silicon (MG-Si) via vacuum metallurgical technique was proposed, which is a promising process to feedstock solar... ℃, time 4 d, diameter for raw material 50 μm. The removal efficiencies of impurities iron and aluminum are up to 85% and 75%, respectively. Key words: solar grade silicon; metallurgical grade silicon......
on technological optimization of SSP prepared from electronic grade silicon powder, SSP solar cell devices with simple structure are prepared and the effect of SSP substrate is discussed. Up to now...SUBSTRATE MATERIALS FOR POLY-CSiTF SOLAR CELLS:OPTIMIZATION OF SILICON SHEET FROM POWDER X.W. Zou1,H.Shen2,Z.C. Liang1,Q. Ban2,X.J. Wang1 (1.Guangzhou Institute of Energy Conversion, The Chinese......
method; metallurgical purification process; tin-silicon system; solar grade silicon 1 Introduction With the rapid development of photovoltaic industry, the main feed stock for solar cell called solar... solidification. References [1] WODITSCH P, KOCH W. Solar grade silicon feedstock supply for PV industry [J]. Solar Energy Materials and Solar Cells, 2002, 72(1): 11-26. [2] MORITA K, MIKI T......
words: solar grade silicon; slag treatment; boron removal; partition coefficient 1 Introduction The total power capacity generated by solar cell usage reached 7.2 GW in 2009-an increase of 15% despite the international financial crisis. Accordingly, the supply of solar grade silicon (SOG-Si) experienced a rapid growth [1]. As the traditional Siemens method is complicated, and the investment......
grade silicon; slag system; partition ratio 1 Introduction The production of solar cells increased rapidly in recent years. The market which uses the scrap of semiconductor grade silicon (SEG-Si... in silicon. References [1] TAKASHI I, MASAFUMI M. Purification of metallurgical silicon for solar-grade silicon by electron beam button melting [J]. ISIJ International, 1992, 32(5): 635-642. [2......
Trans. Nonferrous Met. Soc. China 22(2012) 2548-2553 Preparation, microstructure and dislocation of solar-grade multicrystalline silicon by directional solidification from metallurgical-grade... 2012 Abstract: A vacuum directional solidification with high temperature gradient was performed to prepare low cost solar-grade multicrystalline silicon (mc-Si) directly from metallurgical-grade mc-Si......