Historically, the melt growth of II-VI crystals has benefitted from the application of the accelerated crucible rotation technique (ACRT). Here, we employ a comprehensive numerical model to assess the impact of two ACRT schedules designed for a cadmium zinc telluride growth system per the classical recommendations of Capper and co-workers. The “flow maximizing” ACRT schedule, with higher rotation, effectively mixes the solutal field in the melt but does not reduce supercooling adjacent to the growth interface. The ACRT schedule derived for stable Ekman flow, with lower rotation, proves more effective in reducing supercooling and promoting stable growth. These counterintuitive results highlight the need for more comprehensive studies on the optimization of ACRT schedules for specific growth systems and for desired growth outcomes.
Bibliographical noteFunding Information:
This work has been supported in part by the U.S. Department of Energy , NNSA Prime Award DE-NA0002565 , and Washington State University Subaward 118717-G003369 ; no official endorsement should be inferred. Significant input was provided by K. Lynn, J. McCoy, S. Swain, and S. Kakkireini. Code development at the University of Minnesota was supported by A. Yeckel.
- A1. Computer simulation
- A1. Convection
- A1. Crystal morphology
- A1. Heat transfer
- A1. Mass transfer
- B1. Semiconducting II-VI materials