• Ultra-high Seebeck coefficient of nanostructured Sb-substituted PbTe and fabrication of a thermoelectric generator module

• # Fulltext

https://www.ias.ac.in/article/fulltext/boms/044/0009

• # Keywords

Thermoelectric; lead telluride; Seebeck coefficient; thermoelectric generator.

• # Abstract

Compounds belonging to the series PbSb$_x$Te$_{1-x}$ and Pb$_{1-x}$Sb$_x$Te ($x = 0.1, 0.3, 0.5$) were prepared in thenanostructured form by employing high-energy ball-milling and subsequent hot-pressing. The amphoteric property of antimony was utilized to substitute lead and tellurium in the compounds having the formula PbSb$_x$Te$_{1-x}$ and Pb$_{1-x}$Sb$_x$Te to make them p and n. All the compositions were evaluated for their figure of merit (ZT) and power factor afterascertaining their Seebeck coefficient, electrical and thermal conductivities. These compositions exhibited very high Seebeck coefficient both in low- and room-temperature regimes. Thermoelectric generator modules were constructed using combinations of n- and p-type PbSbTe and the voltage developed was measured and compared with the calculatedvalues, and they are found to be in good agreement. Different combinations of p- and n-types from the series were tested,and the best among them were identified.

• # Author Affiliations

1. Department of Physics, Cochin University of Science and Technology, Cochin 682022, India
2. Department of Physics, Indian Institute of Space Science and Technology, Thiruvananthapuram 695547, India
3. Inter-University Centre for Nanomaterials and Devices, Cochin University of Science and Technology, Cochin 682022, India

• # Bulletin of Materials Science

Volume 45, 2022
All articles
Continuous Article Publishing mode

• # Dr Shanti Swarup Bhatnagar for Science and Technology

Posted on October 12, 2020

Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020