Article

Numerical simulation of vertical Bridgman solidification of CdZnTe

¹ LabEM (LR11ES34), University of Sousse, ESSTH Sousse, rue Lamine Abbassi, 4011 Hammam Sousse, Tunisia
² CNRS-SPCTS/CEC, 12 rue Atlantis, 87068 Limoges, France
³ Université de Lorraine, Lab. Energétique de Longwy – LERMAB/FJV, Longwy, France

^* e-mail: hanene.jamai@etu.unilim.fr

Received: 8 February 2014
Accepted: 17 April 2014

Abstract

The solidification of the singular CdZnTe in axisymetric Vertical Bridgman (VB) cavity is investigated in the current study. The numerical approach is developed by using COMSOL Multiphysics software, which is based on finite elements method (FEM) with Arbitrary Lagrangian-Euleurian (ALE) formulation allowing treating the moving interface. Numerical aspects of different parameters that affect the solidification interface and present an important factor during the crystal growth’s process are presented and analyzed. Especial attention will be paid to investigate the thermophysical properties such as thermal diffusivity, heat capacity. Thermal conductivity and the effect of thermal condition specially the effect of cold temperature T_c which affects significantly the concavity and the convexity of the interface for specific ranges in the solidification of CdZnTe phenomena, but it is of great importance the crystal growth experts are not it given importance. It has been shown that this properties, the effect of T_c, and the variation of interface velocity affect the solid/liquid interface shape and the crystal growth process.