Micro-Raman imaging of Te precipitates in CdZnTe (Zn similar to 4%) crystals

Kulkarni, Gururaj Anand and Sathe, VG and Rao, KSRK and Muthu, DVS and Sharma, RK (2008) Micro-Raman imaging of Te precipitates in CdZnTe (Zn similar to 4%) crystals. In: Journal of Applied Physics, 105 (6). pp. 1-6.

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Abstract

Micro-Raman imaging of the distribution of Te precipitates in CdZnTe crystals in different phases is reported. For the normal phase of Te precipitates, the Raman modes appear centered around 121(A1), 141(E)/TO(CdTe) cm−1 and a weak mode around 92(E) cm−1 in CdZnTe indicating the presence of trigonal lattice of Te. Under high pressure phase, the volume of Te precipitates collapses, giving more bond energy resulting in the blueshift of the corresponding Raman bands. Also, the spatial distribution of the area ratio of 121 to 141 cm−1 Raman modes is used to quantify Te precipitates. Further, near-infrared microscopy images support these results.

Item Type:	Journal Article
Publication:	Journal of Applied Physics
Publisher:	American Institute Physics
Additional Information:	The copyright of this article belongs to American Institute of Physics.
Keywords:	cadmium compounds; II-VI semiconductors; infrared spectra; ionisation potential; precipitation; Raman spectra; space groups; spectral line shift; zinc compounds
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	03 Jan 2010 10:22
Last Modified:	19 Sep 2010 05:30
URI:	http://eprints.iisc.ac.in/id/eprint/19881

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