Preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.

The growing field of silicon solar cells requires a substantial reduction in the cost of semiconductor grade silicon, which has been mainly produced by the rod-based Siemens method. Because silicon can react with almost all of the elements and form a number of alloys at high temperatures, it is high...

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Autores principales:	Yuan Chen, Yang Liu, Xin Wang, Kai Li, Pu Chen
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b7c3a2b5a50642198f314af9e541279b
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spelling	oai:doaj.org-article:b7c3a2b5a50642198f314af9e541279b2021-11-25T06:03:21ZPreparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.1932-620310.1371/journal.pone.0105537https://doaj.org/article/b7c3a2b5a50642198f314af9e541279b2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25153509/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The growing field of silicon solar cells requires a substantial reduction in the cost of semiconductor grade silicon, which has been mainly produced by the rod-based Siemens method. Because silicon can react with almost all of the elements and form a number of alloys at high temperatures, it is highly desired to obtain high purity crystalline silicon at relatively low temperatures through low cost process. Here we report a fast, complete and inexpensive reduction method for converting sodium hexafluorosilicate into silicon at a relatively low reaction temperature (∼ 200 °C). This temperature could be further decreased to less than 180 °C in combination with an electrochemical approach. The residue sodium fluoride is dissolved away by pure water and hydrochloric acid solution in later purifying processes below 15 °C. High purity silicon in particle form can be obtained. The relative simplicity of this method might lead to a low cost process in producing high purity silicon.Yuan ChenYang LiuXin WangKai LiPu ChenPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 8, p e105537 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuan Chen Yang Liu Xin Wang Kai Li Pu Chen Preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.
description	The growing field of silicon solar cells requires a substantial reduction in the cost of semiconductor grade silicon, which has been mainly produced by the rod-based Siemens method. Because silicon can react with almost all of the elements and form a number of alloys at high temperatures, it is highly desired to obtain high purity crystalline silicon at relatively low temperatures through low cost process. Here we report a fast, complete and inexpensive reduction method for converting sodium hexafluorosilicate into silicon at a relatively low reaction temperature (∼ 200 °C). This temperature could be further decreased to less than 180 °C in combination with an electrochemical approach. The residue sodium fluoride is dissolved away by pure water and hydrochloric acid solution in later purifying processes below 15 °C. High purity silicon in particle form can be obtained. The relative simplicity of this method might lead to a low cost process in producing high purity silicon.
format	article
author	Yuan Chen Yang Liu Xin Wang Kai Li Pu Chen
author_facet	Yuan Chen Yang Liu Xin Wang Kai Li Pu Chen
author_sort	Yuan Chen
title	Preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.
title_short	Preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.
title_full	Preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.
title_fullStr	Preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.
title_full_unstemmed	Preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.
title_sort	preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °c.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/b7c3a2b5a50642198f314af9e541279b
work_keys_str_mv	AT yuanchen preparationofhighpuritycrystallinesiliconbyelectrocatalyticreductionofsodiumhexafluorosilicatewithsodiumbelow180c AT yangliu preparationofhighpuritycrystallinesiliconbyelectrocatalyticreductionofsodiumhexafluorosilicatewithsodiumbelow180c AT xinwang preparationofhighpuritycrystallinesiliconbyelectrocatalyticreductionofsodiumhexafluorosilicatewithsodiumbelow180c AT kaili preparationofhighpuritycrystallinesiliconbyelectrocatalyticreductionofsodiumhexafluorosilicatewithsodiumbelow180c AT puchen preparationofhighpuritycrystallinesiliconbyelectrocatalyticreductionofsodiumhexafluorosilicatewithsodiumbelow180c
_version_	1718414242473836544

Preparation of high purity crystalline silicon by electro-catalytic reduction of sodium hexafluorosilicate with sodium below 180 °C.

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