Thermoelectric Figure-of-Merit of Fully Dense Single-Crystalline SnSe

Pai-Chun Wei, Sriparna Bhattacharya, Yu Fei Liu, Fengjiao Liu, Jian He, Yung Hsiang Tung, Chun Chuen Yang, Cheng Rong Hsing, Duc Long Nguyen, Ching Ming Wei, Mei Yin Chou, Yen Chung Lai, Tsu Lien Hung, Syu You Guan, Chia Seng Chang, Hsin Jay Wu, Chi Hung Lee, Wen Hsien Li, Raphael P. Hermann, Yang Yuan ChenApparao M. Rao

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38 Scopus citations


Single-crystalline SnSe has attracted much attention because of its record high figure-of-merit ZT ≈ 2.6; however, this high ZT has been associated with the low mass density of samples which leaves the intrinsic ZT of fully dense pristine SnSe in question. To this end, we prepared high-quality fully dense SnSe single crystals and performed detailed structural, electrical, and thermal transport measurements over a wide temperature range along the major crystallographic directions. Our single crystals were fully dense and of high purity as confirmed via high statistics 119Sn Mössbauer spectroscopy that revealed
Original languageEnglish (US)
Pages (from-to)5442-5450
Number of pages9
JournalACS Omega
Issue number3
StatePublished - Mar 19 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors wish to acknowledge Prof. Terry Tritt (Clemson University) for providing access to low temperature measurement facilities in his laboratory, and Prof. Julian Goldsmid, Dr. Pooja Puneet, and Prakash Parajuli for valuable discussions. We also thank National Institute of Standards and Technology and Dr. Jeffrey W. Lynn for providing the neutron beam time that made the neutron rocking curve measurements possible. R.P.H. thanks Dipanshu Bansal and Jiawang Hong for numerical phonon data in refs (11) and (26).


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