摘要
用傅里叶红外光谱仪(FTIR)测定定向凝固太阳能电池用多晶硅的轴向碳浓度分布。结果表明:实验样品的轴向碳浓度分布符合分凝规律。用经典分凝公式模拟该铸造多晶硅的轴向碳浓度分布,得到该铸造多晶硅的有效分凝系数为0.45。取硅熔点温度为定向凝固过程温度,通过BPS公式计算得到,碳在定向凝固过程中的扩散速度在4.72×10-8～4.72×10-7 cm/s的范围。
This paper uses Fourier Transform Infrared spectrometer （FTIR） to measure the axial distribution of carbon concentration of mc-Si used for solar ceils with directional solidification. The result shows that the axial distribution of carbon concentration of the test sample fits with segregation rules. This paper stimulates the axial distribution of carbon concentration of casting mc-Si using the classical segregation formula and obtains that the effective segregation coefficient of this casting mc-Si is 0. 45. With the melting temperature of silicon as the temperature in directional solidification process, it is obtained through BPS formula that the diffusion rate of carbon in directional solidification process is between 4.72×10^-8～4.72×10^-7cm/s.
出处
《浙江理工大学学报（自然科学版）》
2013年第2期250-253,共4页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
关键词
铸造多晶硅
碳浓度
分布
FTIR
casting me-Si
carbon concentration
distribution
FTIR
