Modeling of the Growth of CdTe Single Crystals by the Traveling Heater Method under Various Magnetic Fields

摘要

Various efforts, such as using different growth techniques and growth conditions, have been made to grow large scale and high quality cadmium telluride (CdTe) single crystals in order to better fit the requirements of their applications in electrical and optical fields. Among many growth techniques, the THM has the potential for growing bulk ternary crystals because of their characteristic of large segregation effect between solid and liquid. In addition, being a solution growth technique, the THM grows crystals in comparatively low temperatures. This lower operating temperature could lead to a lower ambient pressure, and reduce the risk of ampoule fracture and contamination to the crystal. The application of an external magnetic field is also used in crystal growth to suppress convection and to enhance mixing. The experimental setup designed to have the vertical magnetic field has been established in our laboratory. The objective of the present article is to numerically explore the role of magnetic field in crystal growth and provide good information and guidance for the ongoing experiments.