Electrical and thermal transport properties of Pb1−xSnxSe solid solution thermoelectric materials

Literature Information

Publication Date 2015-04-20
DOI 10.1039/C4CP06021K
Impact Factor 3.676
Authors

Chao-Feng Wu, Tian-Ran Wei, Jing-Feng Li


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Abstract

Both lead selenide (PbSe) and tin selenide (SnSe) are promising thermoelectric compounds consisting of earth-abundant elements, between which solid solutions can be formed over a wide composition range. This study investigated the electrical and thermal transport properties of n-type Pb1−xSnxSe (x = 0, 0.01, 0.05, 0.1 and 0.15) solid solutions with emphasis on the effect of Sn substitution. Small amounts of Sn substitution (x ≤ 0.1) increased electrical conductivity but showed less influence on the Seebeck coefficient, leading to improved power factors, which were revealed to be associated with the generation of native Se vacancies. The electrical conductivity tended to decrease when x > 0.1 due to the alloying effect, consequently the thermoelectric figure of merit was not further increased, even though the thermal conductivity can be reduced by increasing Sn content. A maximum dimensionless figure of merit ZT of up to 1.0 was obtained at moderate temperature (773 K) for the composition of Pb0.9Sn0.1Se.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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