Optical and electrical studies of vapour phase grown Cd1-xCoxTe crystals |
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| Authors: | Reddy Y Dwarakanadha Reddy B K Reddy D Sreekantha Reddy D R |
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| Affiliation: | Department of Physics, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India. ydreddy64@yahoomail.com |
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| Abstract: | 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. |
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| Keywords: | Vapour phase growth technique DMS Cd1− xCoxTe crystals Reflectivity studies Band gap Electrical properties |
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