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Chalcopyrite ZnSnSb_2: A Promising Thermoelectric Material

Nomura, Ami and Choi, Seongho and Ishimaru, Manabu and Kosuga, Atsuko and Chasapis, Thomas and Ohno, Saneyuki and Snyder, G. Jeffrey and Ohishi, Yuji and Muta, Hiroaki and Yamanaka, Shinsuke and Kurosaki, Ken (2018) Chalcopyrite ZnSnSb_2: A Promising Thermoelectric Material. ACS Applied Materials & Interfaces, 10 (50). pp. 43682-43690. ISSN 1944-8244. http://resolver.caltech.edu/CaltechAUTHORS:20181127-102430014

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Abstract

Ternary compounds with a tetragonal chalcopyrite structure, such as CuGaTe2, are promising thermoelectric (TE) materials. It has been demonstrated in various chalcopyrite systems, including compounds with quaternary chalcopyrite-like structures, that the lattice parameter ratio, c/a, being exactly 2.00 to have a pseudo-cubic structure is key to increase the degeneracy at the valence band edge and ultimately achieve high TE performance. Considering the fact that ZnSnSb_2 with a chalcopyrite structure is reported to have c/a close to 2.00, it is expected to have multiple valence bands leading to a high p-type zT. However, there are no complete investigations on the high temperature TE properties of ZnSnSb_2 mainly because of the difficulty of obtaining a single-phase ZnSnSb_2. In the present study, pure ZnSnSb_2 samples with no impurities are synthesized successfully using a Sn flux-based method and TE properties are characterized up to 585 K. Transport properties and thermal analysis indicate that the structure of ZnSnSb_2 remains chalcopyrite with no order–disorder transition and clearly show that ZnSnSb_2 can be made to exhibit a high zT in the low-to-mid temperature range through further optimization.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1021/acsami.8b16717DOIArticle
https://pubs.acs.org/doi/suppl/10.1021/acsami.8b16717PublisherSupporting Information
ORCID:
AuthorORCID
Choi, Seongho0000-0001-8891-5202
Ohno, Saneyuki0000-0001-8192-996X
Snyder, G. Jeffrey0000-0003-1414-8682
Kurosaki, Ken0000-0002-3015-3206
Additional Information:© 2018 American Chemical Society. Received: September 25, 2018; Accepted: November 27, 2018; Published: November 27, 2018. Part of this study was funded by JST, PRESTO Grant Number JPMJPR15R1. Author Contributions: The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. The authors declare no competing financial interest.
Funders:
Funding AgencyGrant Number
Japan Science and Technology AgencyJPMJPR15R1
Record Number:CaltechAUTHORS:20181127-102430014
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20181127-102430014
Official Citation:Chalcopyrite ZnSnSb2: A Promising Thermoelectric Material. Ami Nomura, Seongho Choi, Manabu Ishimaru, Atsuko Kosuga, Thomas Chasapis, Saneyuki Ohno, G. Jeffrey Snyder, Yuji Ohishi, Hiroaki Muta, Shinsuke Yamanaka, and Ken Kurosaki. ACS Applied Materials & Interfaces 2018 10 (50), 43682-43690 DOI: 10.1021/acsami.8b16717
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91217
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:27 Nov 2018 21:45
Last Modified:20 Dec 2018 16:56

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