Enhanced thermoelectric properties of hydrothermally synthesized n-type Se&Lu-codoped Bi2Te3
Source abstract
Abstract
Abstract N-type Se&Lu-codoped Bi2Te3nanopowders were prepared by hydrothermal method and sintered by spark plasma sintering technology to form dense samples. By further doping Se element into Lu-doped Bi2Te3samples, the thickness of the nanosheets has the tendency to become thinner. The electrical conductivity of Lu0.1Bi1.9Te3−xSexmaterial is reduced with the increasing Se content due to the reduced carrier concentration, while the Seeback coefficient values are enhanced. The lattice thermal conductivity of the Lu0.1Bi1.9Te3−xSexis greatly reduced due to the introduced point defects and atomic mass fluctuation. Finally, the Lu0.1Bi1.9Te2.7Se0.3sample obtained a maximumZTvalue of 0.85 at 420 K. This study provides a low-cost and simple low-temperature method to mass production of Se&Lu-codoped Bi2Te3with high thermoelectric performance for practical applications.
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Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Advanced Thermodynamics and Statistical Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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