Removing Phosphorus from Molten Silicon: A Thermodynamic Evaluation of Distillation
Removing Phosphorus from Molten Silicon: A Thermodynamic Evaluation of Distillation
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DOI：
10.1149/2.0361602jss
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发表时间：
2016
影响因子：
2.2
通讯作者：
Simon Favre;I. Nuta;G. Chichignoud;K. Zaidat;C. Chatillon
中科院分区：
文献类型：
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作者：
Simon Favre;I. Nuta;G. Chichignoud;K. Zaidat;C. Chatillon
在为太阳能电池提纯熔融硅的过程中，磷是少数仍有问题的杂质之一。目前的目的是开发一种新方法，使最终磷浓度约为0.5 wppm。我们首先关注控制过程的主要热力学参数：相关热力学参数取自文献，如活度、分压和相互作用系数。根据我们的结果，磷的真空蒸馏是在高温下进行的。然而，真空中存在的残余氧是蒸馏的障碍，因为它以硅氧化物的形式蒸发。(C) 2015中国电化学会。版权所有。
Within the framework of purification of molten silicon for solar cells, phosphorus is one of few impurities that remains problematic. The present purpose is to develop a new method that leads to a final phosphorus concentration around 0.5 wppm. We have first focused on the main thermodynamic parameters that control the process: relevant thermodynamic parameters are taken from literature, such as activities, partial pressures and interaction coefficients. According to our results, distillation of phosphorus under vacuum occurs at high temperatures. Yet, the residual oxygen present in the vacuum is a hindrance to the distillation, since it evaporates in the form of silicon oxides. (C) 2015 The Electrochemical Society. All rights reserved.