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Method for the production of directionally solidified czochralski from silicon ingots or thin plates or multicrystalline or floating zone silicon tapes for the manufacture of solar cell pellets
Method for the production of directionally solidified czochralski from silicon ingots or thin plates or multicrystalline or floating zone silicon tapes for the manufacture of solar cell pellets
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机译：由硅锭或薄板或多晶或浮区硅带生产定向凝固的czochralski的方法，用于制造太阳能电池片
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摘要
METHOD FOR THE PRODUCTION OF CZOCHRALSKI DIRECTLY SOLIDATED ON SILICIO LANGUAGES OR THIN SHEETS OR FOLDING SILICIO TAPES OR FLOATING ZONE FOR MANUFACTURE OF SOLAR CELLS. The present invention relates to a method for producing directionally solidified Czochralski from silicon ingots or thin plates or multicrystalline or floating zone silicon tapes for making solar cell pellets from silicon feedstock initially containing between 0 , 2 ppma and 10 ppma of boron and between 0,1 ppma and 10 ppma of phosphorus. If the boron content in the silicon feedstock is greater than the phosphorus content, the boron content of the molten silicon is maintained above the phosphorus content during the directional solidification process by the addition of boron to the molten silicon to extend the portion of the ingot or thin sheet or directionally solidified tape that solidifies as a p-type material. If the phosphorus content in the silicon feedstock is greater than the boron content, the phosphorus content in the molten silicon is maintained above the boron content during the directional solidification process by adding phosphorus to the molten silicon to extend it. the part of the ingot or thin sheet or tape that solidifies as type n material.
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