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Largely Enhanced Thermoelectric Power Factor of Flexible Cu 2−x S Film by Doping Mn.
- Source :
- Materials (1996-1944); Nov2023, Vol. 16 Issue 22, p7159, 12p
- Publication Year :
- 2023
-
Abstract
- Copper-sulfide-based materials have attracted noteworthy attention as thermoelectric materials due to rich elemental reserves, non-toxicity, low thermal conductivity, and adjustable electrical properties. However, research on the flexible thermoelectrics of copper sulfide has not yet been reported. In this work, we developed a facile method to prepare flexible Mn-doped Cu<subscript>2−x</subscript>S films on nylon membranes. First, nano to submicron powders with nominal compositions of Cu<subscript>2−x</subscript>Mn<subscript>y</subscript>S (y = 0, 0.01, 0.03, 0.05, 0.07) were synthesized by a hydrothermal method. Then, the powders were vacuum-filtrated on nylon membranes and finally hot-pressed. Phase composition and microstructure analysis revealed that the films contained both Cu<subscript>2</subscript>S and Cu<subscript>1.96</subscript>S, and the size of the grains was ~20–300 nm. By Mn doping, there was an increase in carrier concentration and mobility, and ultimately, the electrical properties of Cu<subscript>2−x</subscript>S were improved. Eventually, the Cu<subscript>2−x</subscript>Mn<subscript>0.05</subscript>S film showed a maximum power factor of 113.3 μW m<superscript>−1</superscript> K<superscript>−2</superscript> and good flexibility at room temperature. Moreover, an assembled four-leg flexible thermoelectric generator produced a maximum power of 249.48 nW (corresponding power density ~1.23 W m<superscript>−2</superscript>) at a temperature difference of 30.1 K, and had good potential for powering low-power-consumption wearable electronics. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19961944
- Volume :
- 16
- Issue :
- 22
- Database :
- Complementary Index
- Journal :
- Materials (1996-1944)
- Publication Type :
- Academic Journal
- Accession number :
- 173865892
- Full Text :
- https://doi.org/10.3390/ma16227159