The authors have studied the effect of Te doping on structural, morphological and thermopower of PbSe for the composition of PbSe1–xTex (x = 0·0, 0·2, 0·50, 0·75, 0·9 and 1·0). The samples were prepared using melting and rocking. The scanning electron microscopy indicated that all the samples have lamellar morphology. The X-ray diffraction analysis suggested that the lattice parameter increases linearly with dopant concentration (x). The temperature dependence of thermopower measured for samples having different x revealed unusual increase in thermopower for the composition x = 0·5, for example, at 427°C, and the thermopower values for PbSe0·5Te0·5, PbTe and PbSe were 292, 188 and 134 μV/K, respectively. A dramatic thermopower enhancement for PbSe0·5Te0·5 is attributed to scattering of the majority charge carriers by the defect sites.
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November 2012
Research Article|
November 01 2012
Effect of Te doping on the thermopower of PbSe1–xTex Available to Purchase
Ranita Basu, MSc;
Ranita Basu, MSc
*
Technical Physics Division, Bhabha Atomic Research Centre, Mumbai, India
*Corresponding author e-mail address: ranitapaul@gmail.com
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S. Bhattacharya, PhD;
S. Bhattacharya, PhD
Technical Physics Division, Bhabha Atomic Research Centre, Mumbai, India
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Ranu Bhatt, PhD;
Ranu Bhatt, PhD
Technical Physics Division, Bhabha Atomic Research Centre, Mumbai, India
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Ajay Singh, PhD;
Ajay Singh, PhD
Technical Physics Division, Bhabha Atomic Research Centre, Mumbai, India
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D. K. Aswal, PhD;
D. K. Aswal, PhD
Technical Physics Division, Bhabha Atomic Research Centre, Mumbai, India
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S. K. Gupta, PhD
S. K. Gupta, PhD
Technical Physics Division, Bhabha Atomic Research Centre, Mumbai, India
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*Corresponding author e-mail address: ranitapaul@gmail.com
Publisher: Emerald Publishing
Received:
May 29 2012
Accepted:
November 08 2012
Online ISSN: 2046-0155
Print ISSN: 2046-0147
ICE Publishing: All rights reserved
2012
Emerging Materials Research (2012) 1 (6): 306–311.
Article history
Received:
May 29 2012
Accepted:
November 08 2012
Citation
Basu R, Bhattacharya S, Bhatt R, Singh A, Aswal DK, Gupta SK (2012), "Effect of Te doping on the thermopower of PbSe1–xTex". Emerging Materials Research, Vol. 1 No. 6 pp. 306–311, doi: https://doi.org/10.1680/emr.12.00015
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