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Thin Film Tin Selenide (SnSe) Thermoelectric Generators Exhibiting Ultralow Thermal Conductivity / Matthew R. Burton; Tianjun Liu; James McGettrick; Shahin Mehraban; Jenny Baker; Adam Pockett; Trystan Watson; Oliver Fenwick; Matthew J. Carnie

Advanced Materials, Volume: 30, Issue: 31, Start page: 1801357

Swansea University Author: Baker, Jennifer

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DOI (Published version): 10.1002/adma.201801357

Abstract

Tin selenide (SnSe) has attracted much attention in the field of thermoelectrics since the discovery of the record figure of merit (ZT) of 2.6 ± 0.3 along the b‐axis of the material. The record ZT is attributed to an ultralow thermal conductivity that arises from anharmonicity in bonding. While it i...

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Published in: Advanced Materials
ISSN: 0935-9648
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa43411
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Abstract: Tin selenide (SnSe) has attracted much attention in the field of thermoelectrics since the discovery of the record figure of merit (ZT) of 2.6 ± 0.3 along the b‐axis of the material. The record ZT is attributed to an ultralow thermal conductivity that arises from anharmonicity in bonding. While it is known that nanostructuring offers the prospect of enhanced thermoelectric performance, there have been minimal studies in the literature to date of the thermoelectric performance of thin films of SnSe. In this work, preferentially orientated porous networks of thin film SnSe nanosheets are fabricated using a simple thermal evaporation method, which exhibits an unprecedentedly low thermal conductivity of 0.08 W m−1 K−1 between 375 and 450 K. In addition, the first known example of a working SnSe thermoelectric generator is presented and characterized.
Keywords: nanosheets, thermal conductivity, thermoelectrics, thin films, tin selenide
College: College of Engineering
Issue: 31
Start Page: 1801357