Question

How to find dopant concentration when cocentration in melt and distribution coefficient

Answer 1

... C is the dopant concentration in the crystal at the liquid-solid interface, C 0 is the initial dopant concentration in the melt, k is the distribution coefficient and g is the fraction of the melt which has solidified. The distribution of the dopant concentration along the ingot length obtained from Equation 1 for different values of k is shown in Fig. 1. As seen from Fig. 1, the gradient of the dopant concentration along the ingot is larger when the distribution coef fi cient of the dopant differs signi fi cantly from unity. Another factor which affects the dopant distribution is the ingot diameter ( D ) to length ( L ) ratio ( R = D / L ). For a fi xed mass of the ingot, the ratio ...

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