Stability-based optimization of ACRT for the growth of CZT by the traveling heater method

Jeff H Peterson, Zachary Cosenza, Jeffrey J. Derby

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Numerical modeling is employed to study the effects of several accelerated crucible rotation technique (ACRT) rotation schedules on the growth of cadmium zinc telluride (CZT) by the traveling heater method (THM). In conjunction with these analyses, a measure is developed to estimate the amplitude of disturbances associated with cellular interface growth morphologies that develop over time and across the melt-solid interface. This disturbance amplitude measure is used to assess the ability of ACRT to stabilize the growth interface and thereby minimize inclusion formation processes. Notably, our analyses reveal that interfacial instability is not well correlated with melt undercooling, explaining why classical ACRT approaches to reduce undercooling by mixing may not stabilize growth. Computations show that interface stability is best achieved via rotation schedules that accentuate outward Ekman flows during spin-up and, during spin-down, eliminate Taylor-Görtler flows and minimize inward Ekman flows.

Original languageEnglish (US)
Article number126446
JournalJournal of Crystal Growth
StatePublished - Feb 1 2022

Bibliographical note

Funding 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.

Publisher Copyright:
© 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


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