Chlorine Free Technology for Solar-Grade Silicon Manufacturing. Preprint.

Strebkov, D. S. ; Pinov, A. ; Zadde, V. V. ; Lebedev, E. N. ; Belov, E. P.

Technical Information Center Oak Ridge Tennessee

关键词: Silicon solar cells;    Chlorine;    Distillation;    Energy consumption;    Manufacturing;   

RP-ID  :  DE200415009895

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Due to the development of the solar energy industry, a significant increase of polysilicon feedstock (PSF) production will be required in near future. The creation of special technology of solar grade polysilicon feedstock production is an important problem. Today, semiconductor-grade polysilicon is mainly manufactured using the trichlorosilane (SiHCl3) distillation and reduction. The feed-stock for trichlorosilane is metallurgical-grade silicon, the product of reduction of natural quartzite (silica). This polysilicon production method is characterized by high energy consumption and large amounts of wastes, containing environmentally harmful chlorine based compounds. In the former USSR the principles of industrial method for production of monosilane and polycrystalline silicon by thermal decomposition of monosilane were founded. This technology was proved in industrial scale at production of gaseous monosilane and PSF. We offered new chlorine free technology (CFT).