太陽電池用シリコンシートの結晶成長 : Si半導体結晶(<特集>21世紀を拓く薄膜結晶成長)

概要

論文の詳細を見る
The rotational solidification of polycrystalline silicon has the advantage of the drastic costdown of solar cell and the spread of photovaltaic system to our life, because its process is essentially sliceless and continuous. The characteristics of the polycrystalline silicon wafer by this method were clarified as follows. (1) The crystal orientations are random, but each grains are columnar and grown to the vertical direction on the graphite substrate . (2) The wafer thickness decreases and the dendritic crystal growth disappears with the increase of rotating speed of cooled roller. On the other hand the grain sizes become smaller and the grain boundaries are distorted. (3) Conseqently, the solar cell fabricated on the polycrystalline silicon substrate which is grown for rotating speed of 0.5 rpm has the efficiency of 12.2%. Considering its productivity, this result is promissing for practical use.
日本結晶成長学会の論文
2000-10-25