Purification of metallurgical-grade silicon up to solar grade
| Autor: | Masamichi Abe, Noriyoshi Yuge, Shoichi Hiwasa, Hiroyuki Baba, Yasuhiko Sakaguchi, Nakamura Naomichi, Fukuo Aratani, Yoshiei Kato, Kazuhiro Hanazawa |
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| Rok vydání: | 2001 |
| Předmět: |
Materials science
Silicon Renewable Energy Sustainability and the Environment business.industry Metallurgy chemistry.chemical_element Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Semiconductor chemistry law Impurity Solar cell Electrical and Electronic Engineering Electron-beam furnace Ingot business Boron Directional solidification |
| Zdroj: | Progress in Photovoltaics: Research and Applications. 9:203-209 |
| ISSN: | 1099-159X 1062-7995 |
| DOI: | 10.1002/pip.372 |
| Popis: | 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 Ω cm. Copyright © 2001 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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