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https://hdl.handle.net/10119/15362
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| Title: | Sustainable thermoelectric materials fabricated by using Cu_2Sn_<1-x>Zn_xS_3 nanoparticles as building blocks |
| Authors: | Zhou, Wei
Shijimaya, Chiko
Takahashi, Mari
Miyata, Masanobu
Mott, Derrick
Koyano, Mikio
Ohta, Michihiro
Akatsuka, Takeo
Ono, Hironobu
Maenosono, Shinya |
| Keywords: | Thermoelectrics
Nanoparticle
Phonon Scattering
Pulse Electric Current Sintering |
| Issue Date: | 2017-12-28 |
| Publisher: | American Institute of Physics |
| Magazine name: | Applied Physics Letters |
| Volume: | 111 |
| Number: | 26 |
| Start page: | 263105-1 |
| End page: | 263105-5 |
| DOI: | 10.1063/1.5009594 |
| Abstract: | Uniform Cu_2Sn_<1-x>Zn_xS_3 (x = 0–0.2) nanoparticles (NPs) with a characteristic size of about 40 nm were chemically synthesized. The primary crystal phase of the NPs was wurtzite (WZ) with a mean crystalline size of about 20 nm. The NPs were sintered to form nanostructured pellets with different compositions preserving the composition and grain size of the original NPs by the pulse electric current sintering technique. The pellets had a zinc blende (ZB) structure with a residual WZ phase, and the mean crystalline size was found to remain virtually unchanged for all pellets. Among all samples, the pellets of Cu_2Sn_<0.95>Zn_<0.05>S_3 and Cu_2Sn_<0.85>Zn_<0.15>S_3 exhibited the highest ZT value (0.37 at 670 K) which is 10 times higher than that of a non-nanostructured Cu_2SnS_3 bulk crystal thanks to effective phonon scattering by nanograins, the phase-pure ZB crystal structure, and the increase in hole carrier density by Zn doping. |
| Rights: | Copyright 2017 Authors. Wei Zhou, Chiko Shijimaya, Mari Takahashi, Masanobu Miyata, Derrick Mott, Mikio Koyano, Michihiro Ohta, Takeo Akatsuka, Hironobu Ono, and Shinya Maenosono, Applied Physics Letters, 111(26), 263105 (2017). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/1.5009594 |
| URI: | https://hdl.handle.net/10119/15362 |
| Material Type: | publisher |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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