Abstract
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 Ωcm.
| Original language | English |
|---|---|
| Pages (from-to) | 203-209 |
| Number of pages | 7 |
| Journal | Progress in Photovoltaics: Research and Applications |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - May 1 2001 |
| Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics
- Electrical and Electronic Engineering
