Indian Journal of Engineering & Materials Sciences

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Enhancing the Thermoelectric Performance of Bismuth Telluride Through Silver Doping


Affiliations
1 Research lab for Energy System, Department of physics, Netaji Subhas University of Technology, New Delhi 110 078
2 Research lab for Energy System, Department of physics, Netaji Subhas University of Technology, New Delhi 110 078, India
3 Department of Physics, Miranda House, University of Delhi, New Delhi 110 007, India
4 Department of physics, Atma ram Santan Dharma College, University of Delhi, New Delhi 110 021, India
 

In the present work, nanoparticles of pure Bi2Te3 and Ag doped Bi2Te3 have been prepared using hydrothermal technique. The thermoelectric performance of bismuth telluride has been found to be improving with Ag doping. This may be due to increase in the carrier concentration resulting in enhanced electrical conductivity of the material, and expected to maintain its low thermal conductivity. The morphology, structural properties of the nanoparticles synthesized in this study has been accessed through the utilization of scanning electron microscopy (SEM) and X-ray diffraction (XRD) technique. Thin films ofas prepared powders ofpure Bi2Te3 and Ag doped Bi2Te3 nanoparticles have deposited on to glass substrate using thermal evaporation technique. The thermoelectric measurements of as synthesized materials have studied using an indigenously developed setup. Seebeck coefficient for pure and Ag doped bismuth telluride thin films has found to be 150 μv°C-1and 182 μv°C-1, respectively.

Keywords

Bismuth chalcogenides, Hydrothermal Technique, Seebeck effect, Thermoelectric generator (TEG).
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  • Enhancing the Thermoelectric Performance of Bismuth Telluride Through Silver Doping

Abstract Views: 112  |  PDF Views: 82

Authors

Jai shree Chaudhary
Research lab for Energy System, Department of physics, Netaji Subhas University of Technology, New Delhi 110 078
Karan Grover
Research lab for Energy System, Department of physics, Netaji Subhas University of Technology, New Delhi 110 078, India
Monika Tomar
Department of Physics, Miranda House, University of Delhi, New Delhi 110 007, India
Anjali Sharma
Department of physics, Atma ram Santan Dharma College, University of Delhi, New Delhi 110 021, India
Ranjana Jha
Research lab for Energy System, Department of physics, Netaji Subhas University of Technology, New Delhi 110 078, India

Abstract


In the present work, nanoparticles of pure Bi2Te3 and Ag doped Bi2Te3 have been prepared using hydrothermal technique. The thermoelectric performance of bismuth telluride has been found to be improving with Ag doping. This may be due to increase in the carrier concentration resulting in enhanced electrical conductivity of the material, and expected to maintain its low thermal conductivity. The morphology, structural properties of the nanoparticles synthesized in this study has been accessed through the utilization of scanning electron microscopy (SEM) and X-ray diffraction (XRD) technique. Thin films ofas prepared powders ofpure Bi2Te3 and Ag doped Bi2Te3 nanoparticles have deposited on to glass substrate using thermal evaporation technique. The thermoelectric measurements of as synthesized materials have studied using an indigenously developed setup. Seebeck coefficient for pure and Ag doped bismuth telluride thin films has found to be 150 μv°C-1and 182 μv°C-1, respectively.

Keywords


Bismuth chalcogenides, Hydrothermal Technique, Seebeck effect, Thermoelectric generator (TEG).

References