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High‐Performance Solution‐Processable Flexible SnSe Nanosheet Films for Lower Grade Waste Heat Recovery
Author(s) -
Rongione Nicolas Augustus,
Li Man,
Wu Huan,
Nguyen Huu Duy,
Kang Joon Sang,
Ouyang Boya,
Xia Hongyan,
Hu Yongjie
Publication year - 2019
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201800774
Subject(s) - materials science , nanosheet , thermoelectric effect , flexible electronics , thermal conductivity , electronics , thin film , optoelectronics , scalability , nanotechnology , thermoelectric materials , waste heat , phonon scattering , composite material , electrical engineering , mechanical engineering , computer science , heat exchanger , physics , engineering , thermodynamics , database
Lower grade waste heat recovery near room temperature is limited due to multiple technology challenges including low efficiency, high cost, and scalability. Here, a low‐cost and scalable solution process is reported to fabricate a nanostructured SnSe thin film, and a high thermoelectric performance near room temperature is demonstrated. This transport study reveals strong phonon scattering near the interfaces between SnSe nanosheets that introduces a large thermal boundary resistance and an ultralow thermal conductivity of 0.09 W m −1 K −1 . Moreover, it is demonstrated that the SnSe thin film can be readily implemented on flexible plastic substrates and preserve the high thermoelectric performance over 1000 bending cycles. Together, this study demonstrates a low‐cost and scalable approach to achieve high‐performance flexible thin film energy harvesting devices to power electronics and sensors near room temperature.