Journal
ADVANCED ELECTRONIC MATERIALS
Volume 5, Issue 3, Pages -Publisher
WILEY
DOI: 10.1002/aelm.201800774
Keywords
2D van der Waals materials; energy efficiency; flexible electronics; nanostructures; phonons; solution-processing; thermal energy harvesting; thermoelectrics
Funding
- CAREER Award through the National Science Foundation
- Young Investigator Award through the US Air Force Office of Scientific Research
- PRF Doctoral New Investigator Award from the American Chemical Society
- Sustainable LA Grand Challenge
- Anthony and Jeanne Pritzker Family Foundation
- National Science Foundation Graduate Research Fellowship [15-597]
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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.
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