Investigation of effect of constitutional supercooling and solute segregation in CZT-LPVB with finite element analysis method

Crystal growth of Cd0.9Zn0.1Te (CZT) using the Liquid-phase Vertical Bridgman method (LPVB) is numerically simulated and analyzed using the simulation software of Comsol Mutiphysics. The influence of curvature on the solid-liquid interface is studied, and the radial solute segregation is calculated for three kinds of growth method. The energy dispersive X-ray (EDX) detector of an SEM was used to test the concentration of Zinc. And all the calculated data are in agreement with the results of the experiments numerically. The diffusion transported mechanism during supercooling of CZT crystal growth was studied and the freezing point curve and the thickness of the boundary layer for different values of G (temperature gradient) and v (growing rate) are discussed.