DataVXACS Applied Energy MaterialsPaper
journal article·2023-01-23Open access

Enhanced Thermoelectric Performance and Mechanical Property in Layered Chalcostibite CuSb1–xPbxSe2

Manojkumar Moorthy, Bhuvanesh Srinivasan, David Berthebaud, Rajasekar Parasuraman, Althaf R, Suresh Perumal

ACS Applied Energy Materials· Volume 6· Issue 2
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Abstract

In this work, the thermoelectric properties of p- type layered chalcostibite CuSb 1– x Pb x Se 2 ( x = 0–0.10) compounds prepared by vacuum melting reaction and uniaxial hot press, have been studied in the temperature range of 323–623 K. Further, aliovalent Pb 2+ doping at Sb 3+ site in CuSbSe 2 notably increases the hole concentration due to its acceptor nature and thereby enhances the electrical conductivity, σ. Importantly, a huge reduction in total thermal conductivity, κ total has been noticed, from ∼1.7 W/mK (pristine CuSbSe 2 ) to ∼0.72 W/mK at 323 K for CuSb 0.90 Pb 0.10 Se 2 owing to increased phonon scattering from the introduced point defects and mass-difference between Pb and Sb. As a result, the thermoelectric figure of merit, z T, has been enhanced to ∼0.27 at 623 K for the composition of CuSb 0.90 Pb 0.10 Se 2, which is 3-fold higher than that of the undoped CuSbSe 2 . Further, the hardness value achieved was ∼125.54 Hv, which is significantly higher than the most of the state-of-the-art materials, indicating it to be an efficient thermoelectric material for intermediate temperature.
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Chalcogenide Semiconductor Thin Films · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory for Energy and Advanced Devices (LEAD), Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamilnadu603 203, India

Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras (IIT-Madras), Chennai600 036, India

Ceramic Technologies Group-Center of Excellence in Materials and Manufacturing for Futuristic Mobility, Indian Institute of Technology Madras (IIT- Madras), Chennai, 600 036, India

CNRS-Saint Gobain-NIMS, IRL 3629, LINK, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba305-0044, Japan

Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology (VIT), Vellore, Tamilnadu632 014, India

Functional Materials Lab, PSG Institute of Advanced Studies, Coimbatore, Tamilnadu641004, India

Funding

Science and Engineering Research Board

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