李鹏廷

个人信息Personal Information

副教授

博士生导师

硕士生导师

性别:男

毕业院校:山东大学

学位:博士

所在单位:材料科学与工程学院

学科:材料学. 材料加工工程

办公地点:新三束实验楼209室

联系方式:0411-84709784

电子邮箱:ptli@dlut.edu.cn

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Distribution of Phosphorus in n-Type Multicrystalline Silicon Produced by Directional Solidification

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论文类型:期刊论文

发表时间:2018-11-01

发表刊物:IEEE JOURNAL OF PHOTOVOLTAICS

收录刊物:SCIE

卷号:8

期号:6

页面范围:1486-1493

ISSN号:2156-3381

关键字:Distribution; evaporation; n-type; phosphorus

摘要:n-type multicrystalline silicon ingot with a doping element of phosphorus was produced by directional solidification under industrial conditions. The evaporation and distribution of phosphorus were studied by content analysis in different positions. The results show that it is mainly controlled by melting and solidification processes. During the melting process, the content of phosphorus reduced from 16.6 and 6.7 ppmw to 11.1 and 6.0 ppmw under different melting times, respectively. The evaporation of phosphorus is mainly affected by the temperature. During the solidification process, the segregation of phosphorus was promoted by evaporation. A formula similar to the Scheil equation was established to calculate the longitudinal distribution of phosphorus in silicon. The results show that its longitudinal distribution is influenced by the evaporation coefficient, the solidification rate, and the temperature gradient. The effective segregation coefficient of phosphorus in ingots a and b was 0.31 and 0.33, respectively, which could be obtained from the fitting result. During the whole process, the phosphorus removal efficiency in ingots a and b was 60.8% and 50.5%, respectively. Its horizontal distribution is related to the morphology of the solid-liquid interface.