Characterization of precipitates in CdTe and Cd(1-x)Zn(x)Te grown by vertical Bridgman-Stockbarger technique

Characterization of precipitates in CdTe and Cd(1-x)Zn(x)Te grown by vertical Bridgman-Stockbarger technique

Different polishing solutions were tested for exposing precipitates in CdTe and Cd(0.96)Zn(0.04) single crystals grown by vertical Bridgman-Stockbarger technique. A solution of 5-7% Br2 in methanol and E-solution were both effective. High resolution scanning electron microscopy with energy dispersiv...

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Veröffentlicht in:Journal of crystal growth 1993-01
Hauptverfasser: Shen, J., Aidun, D. K., Regel, L., Wilcox, W. R.
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Solid-State Physics
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description Different polishing solutions were tested for exposing precipitates in CdTe and Cd(0.96)Zn(0.04) single crystals grown by vertical Bridgman-Stockbarger technique. A solution of 5-7% Br2 in methanol and E-solution were both effective. High resolution scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS) was employed to characterize those exposed precipitates. Most of the polyhedral-shaped Te precipitates with a size range from 3 to 20 microns had voids inside. Partially dissolved Te precipitates were observed in CdTe samples that had been annealed in Cd vapor at 700 C for 10 min. Isolated areas mis-oriented from the matrix were observed in CdTe and Cd(0.96)Zn(0.04)Te that had been annealed in Cd vapor at 700 C for 20 and 50 h, respectively. Te precipitate images were recorded with EDS. By SEM/EDS, Cd-rich precipitates were observed in some Cd-annealed CdTe. C and Na impurities were detected in some Te precipitates.
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title Characterization of precipitates in CdTe and Cd(1-x)Zn(x)Te grown by vertical Bridgman-Stockbarger technique
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