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Greatly Enhanced Thermoelectric Performance of Flexible Cu 2−x S Composite Film on Nylon by Se Doping.
- Source :
- Nanomaterials (2079-4991); Jun2024, Vol. 14 Issue 11, p950, 12p
- Publication Year :
- 2024
-
Abstract
- In this work, flexible Cu<subscript>2−x</subscript>S films on nylon membranes are prepared by combining a simple hydrothermal synthesis and vacuum filtration followed by hot pressing. The films consist of Cu<subscript>2</subscript>S and Cu<subscript>1.96</subscript>S two phases with grain sizes from nano to submicron. Doping Se on the S site not only increases the Cu<subscript>1.96</subscript>S content in the Cu<subscript>2−x</subscript>S to increase carrier concentration but also modifies electronic structure, thereby greatly improves the electrical properties of the Cu<subscript>2−x</subscript>S. Specifically, an optimal composite film with a nominal composition of Cu<subscript>2−x</subscript>S<subscript>0.98</subscript>Se<subscript>0.02</subscript> exhibits a high power factor of ~150.1 μW m<superscript>−1</superscript> K<superscript>−2</superscript> at 300 K, which increases by ~138% compared to that of the pristine Cu<subscript>2−x</subscript>S film. Meanwhile, the composite film shows outstanding flexibility (~97.2% of the original electrical conductivity is maintained after 1500 bending cycles with a bending radius of 4 mm). A four-leg flexible thermoelectric (TE) generator assembled with the optimal film generates a maximum power of 329.6 nW (corresponding power density of 1.70 W m<superscript>−2</superscript>) at a temperature difference of 31.1 K. This work provides a simple route to the preparation of high TE performance Cu<subscript>2−x</subscript>S-based films. [ABSTRACT FROM AUTHOR]
- Subjects :
- CARRIER density
NYLON
HYDROTHERMAL synthesis
HOT pressing
POWER density
Subjects
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 14
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Nanomaterials (2079-4991)
- Publication Type :
- Academic Journal
- Accession number :
- 177863588
- Full Text :
- https://doi.org/10.3390/nano14110950