Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/140436
Title: Solution-processed n-type Bi2Te3 − xSex nanocomposites with enhanced thermoelectric performance via liquid-phase sintering
Authors: Zhang, Chaohua
Zhang, Chunxiao
Ng, Hongkuan
Xiong, Qihua
Keywords: Science::Physics
Issue Date: 2018
Source: Zhang, C., Zhang, C., Ng, H., & Xiong, Q. (2019). Solution-processed n-type Bi2Te3 − xSex nanocomposites with enhanced thermoelectric performance via liquid-phase sintering. Science China Materials, 62(3), 389-398. doi:10.1007/s40843-018-9312-5
Journal: Science China Materials
Abstract: The much slower progress in enhancing the thermoelectric performance of n-type Bi2Te3 than that of p-type Bi2Te3 based materials in the past decade hinders the widespread use in power generation and refrigeration. Here, a facile bottom-up solution-synthesis with spark plasma sintering (SPS) process has been developed to build n-type Bi2Te3−xSex bulk nanocomposites, which substantially improves the power factor and decreases the lattice thermal conductivity by tuning the interface scattering of phonons and electrons. The stoichiometric composition in ternary Bi2Te3−xSex nanocomposites is also tuned to optimize the carrier concentration and lattice thermal conductivity. The optimized bulk nanocomposite Bi2Te2.7Se0.3 exhibits a ZT of 1.1 at ~371 K, which is comparable to the corresponding commercially available ingots. Our results demonstrate the great potential of the solution-processed n-type Bi2Te3−xSex nanocomposites for cost-effective thermoelectric applications.
URI: https://hdl.handle.net/10356/140436
ISSN: 2095-8226
DOI: 10.1007/s40843-018-9312-5
Rights: © 2018 Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved. This paper was published in Science China Materials and is made available with permission of Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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