Purification of metallurgical-grade silicon up to solar grade

被引：125
|
作者：
Yuge, N
Abe, M
Hanazawa, K
Baba, H
Nakamura, N
Kato, Y
Sakaguchi, Y
Hiwasa, S
Aratani, F
机构：
[1] Kawasaki Steel Corp, Tech Res Labs, Kurashiki, Okayama 7128511, Japan
[2] Kawasaki Steel Corp, Photovolta Silicon Business Planning Dept, Kurashiki, Okayama 7128511, Japan
[3] Solar Grade Silicon Technol Res Assoc, Chiyoda Ku, Tokyo 1000011, Japan
来源：
PROGRESS IN PHOTOVOLTAICS | 2001年 / 9卷 / 03期
关键词：
Concentration (process) - Electron beam furnaces - Impurities - Metallurgical furnaces - Semiconducting silicon - Silicon solar cells - Solidification;
D O I：
10.1002/pip.372
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
An estimate has been made of the feasibility of a metallurgical purification process, the NEDO (New Energy and Industrial Technology Development Organization) melt-purification process, for manufacturing solar-grade silicon from metallurgical-grade silicon. Equipment has been developed to pilot manufacturing plant scale. The system comprises an electron-beam furnace for phosphorus removal and a plasma furnace for boron removal. Each furnace has a mold for directional solidification to remove metallic impurities. The concentration of each impurity in the silicon ingot purified through the whole process satisfied the solar-grade level, The Solar-grade silicon produced showed p-type polarity and resistivity within the range 0.5-1.5 Omega cm. Copyright (C) 2001 John Wiley & Sons, Ltd.
引用
收藏
页码：203 / 209
页数：7
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