For the first time, a comprehensive model for the traveling heater method, including detailed species transport and phase-change thermodynamics, is applied to understand the effects of accelerated crucible rotation (ACRT) on the growth of cadmium zinc telluride. A rotation schedule that is designed from classical considerations does not completely mix the melt, rather undercooled regions of localized melt are swept periodically across the growth interface. Even without melt homogenization, these ACRT-driven flows disrupt the persistent undercooling that occurs during THM growth without rotation. An ACRT schedule designed to promote Ekman flows results in lower levels of melt undercooling than a schedule designed to promote Taylor-Görtler flows and greater mixing.
Bibliographical noteFunding Information:
This work was supported by the U.S. National Science Foundation NSF DMR-10007885, the content of which does not necessarily reflect the position or policy of the United States Government, and no official endorsement should be inferred. The authors would like to thank A. Yeckel, who developed and provided support for the Cats2D code at the University of Minnesota.
© 2021 Elsevier B.V.
- A1. Computer simulation
- A1. Fluid flows
- A1. Morphological stability
- A2. Accelerated crucible rotation technique
- A2. Traveling heater method growth
- B2. Semiconducting II-VI materials