Optical and electrical studies of vapour phase grown Cd1-xCoxTe crystals.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

PubMedID: 18434243

Reddy YD, Reddy BK, Reddy DS, Reddy DR. Optical and electrical studies of vapour phase grown Cd1-xCoxTe crystals. Spectrochim Acta A Mol Biomol Spectrosc. 2008;70(4):934-8.
The optical properties of vapour phase grown crystals of diluted magnetic semiconductor (DMS) Cd1-xCoxTe were investigated for x=0.001, 0.003, 0.005, 0.007 and 0.009. The reflectivity spectra exhibited a regular shift in the fundamental absorption edge (E0) with composition x. The reflectivity spectra for the present samples of Cd1-xCoxTe of all compositions exhibit broad bands at 5300 and 11,100cm(-1) due to the transitions of 4A2-->4T1 (F) and 4A2-->4T1 (P), respectively. Temperature dependence of resistivity revealed semiconducting behaviour of the samples. Hot probe test revealed that all the samples exhibited p-type conductivity.