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Different rotation profiles were applied to the ampoule during Vertical Bridgman (VB) growth of Cd0.9Zn0.1Te (CZT) for
enhancing compositional homogeneity, minimizing radial and axial segregation and stabilizing growth interface. The
radial Zinc (Zn) segregation was significantly minimized. Improvements in the axial Zn segregation were also
noticeable. The modifications in interface shapes during the growth were prominent from the photoluminescence (PL)
studies. Improved grain structure was observed with growths containing lower (0.5 wt. %) initial excess Te; however
with higher amount of initial excess Te (7.5 wt. %) high resistivity ingots with improved carrier properties were grown
consistently but with lower single crystal yield. With more intense rotations, resistivity values within the ingot varied by
an order of magnitude showing non uniformity in distribution of dopants.
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