Flow and segregation control by accelerated rotation for vertical Bridgman growth of cadmium zinc telluride: ACRT versus vibration

Segregation control of vertical Bridgman growth of Ga-doped germanium crystals by accelerated crucible rotation: ACRT versus angular vibration

“…[10], which laid between the theoretical curves of no convection and complete mixing. With 10 Hz AVT, the axial segregation was not changed much, which was consistent with the previous simulation predictions [6,7]. In the case of 60 rpm ACRT, the curve tended to be closer to the complete mixing and thus increased the axial segregation.…”

“…Such an asymmetry often enhanced dopant mixing, and thus reduced the radial segregation. The effect of Schlitching flow generated by AVT could be affected by the asymmetric flow as well, and this might explain why AVT was not as effective as we anticipated in the axisymmetric ones [6]. Fig.…”

“…An alternative approach to ACRT is to use a cycle time that is much shorter than the Ekman time. This method is known as the angular vibration technique (AVT) [5,6]. In this technique, the ampoule is vibrated in the angular direction at high frequency (typically greater than 5 Hz).…”

Effects of accelerated crucible rotation on segregation and interface morphology for vertical Bridgman crystal growth: Visualization and simulation

“…A few numerical studies have been made to better understand the interplay of the flow and segregation, e.g. [7][8][9][10][11]. Numerical benchmark comparison can be found as well [11].…”

Optimization of control parameters of cadmium zinc telluride Bridgman single crystal growth

“…Because the CZT crystal growth rate is relatively low, generally not more than ~10 -4 cm/s, and the melt free surface locates at the long high-temperature isothermal section of the furnace chamber in the majority of the duration of the whole crystal growth process, it is assumed that the temperature of all the mesh cells on the free surface is equal to that of the spot on the furnace inner wall having an axial position the same as that of the free surface in this paper. The same boundary condition has been taken by several authors [19,20].…”