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Enhanced thermoelectric performance of Cu3SbS4 flower-like hierarchical architectures composed of Cl doped nanoflakes via an in-situ generated CuS template

Abstract

In this work, Cu3SbS4 hierarchical flower-like microspheres composed of chlorine (Cl-)-doping Cu3SbS4 nanoflakes are realized by one pot solvothermal ion exchange reaction. The kinetic factors including the duration time, the ratio of source materials, and the KOH concentration, are systematically investigated. Using a suite of analytical techniques, including SEM, XRD and FTIR, the two stages in-situ chemical transformation of CuS flower-like microspheres consisted of nanoflakes intermediates to target product Cu3SbS4 formation mechanism is elucidated. The difference in solubility between reactants and products (Ksp(CuS) > Ksp(CuSbSx) determines that the ion-exchange reaction from transition binary to ternary metal chalcogenides is favorable under the impetus of thermodynamic driving force. In addition, the optical and enhanced thermoelectric transport properties are investigated. The results revealed that Cl doped Cu3SbS4 exhibited the improved power factor, which was 8 times higher than that of undoped Cu3SbS4 at 500K. The current study not only provides a facile and economical way to synthesize high-quality Cl-doped Cu-Sb-S three dimensional (3D) hierarchical nanostructures, but also opens up a new route for preparation other I-V-VI multicomponent chalcogenides NCs, such as Cu-Bi-S and Cu-Pb-S systems that would be difficult to obtain otherwise.

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Publication details

The article was received on 21 Sep 2017, accepted on 04 Dec 2017 and first published on 04 Dec 2017


Article type: Paper
DOI: 10.1039/C7CP06465A
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Enhanced thermoelectric performance of Cu3SbS4 flower-like hierarchical architectures composed of Cl doped nanoflakes via an in-situ generated CuS template

    Q. Wang, J. Li and J. Li, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP06465A

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