Improving the zT value of thermoelectrics by nanostructuring: tuning the nanoparticle morphology of Sb2Te3 by using ionic liquids

GND
1038155339
Affiliation
Inorganic Chemistry III – Materials Synthesis and Characterization
Schaumann, Julian;
GND
1188365819
Affiliation
Inorganic Chemistry III – Materials Synthesis and Characterization
Loor, Manuel;
Affiliation
Inorganic Chemistry III – Materials Synthesis and Characterization
Ünal, Derya;
GND
123298830
Affiliation
Inorganic Chemistry III – Materials Synthesis and Characterization
Mudring, Anja-Verena;
GND
1055956255
Affiliation
Faculty of Chemistry and Center for NanoIntegration (CENIDE)
Heimann, Stefan;
GND
1067571620
ORCID
0000-0002-1880-6550
LSF
51063
Affiliation
Interdisciplinary Center for Analytics on the Nanoscale (ICAN)
Hagemann, Ulrich;
GND
1205420940
ORCID
0000-0003-2896-4488
LSF
49379
Affiliation
Faculty of Chemistry and Center for NanoIntegration (CENIDE)
Schulz, Stephan;
ORCID
0000-0002-8634-8096
Affiliation
Faculty of Engineering and Center for NanoIntegration (CENIDE)
Maculewicz, Franziska;
GND
130135615
ORCID
0000-0003-2591-2463
Affiliation
Faculty of Engineering and Center for NanoIntegration (CENIDE)
Schierning, Gabi

A systematic study on the microwave-assisted thermolysis of the single source precursor (Et2Sb)2Te (1) in different asymmetric 1-alkyl-3-methylimidazolium- and symmetric 1,3-dialkylimidazolium-based ionic liquids (ILs) reveals the distinctive role of both the anion and the cation in tuning the morphology and microstructure of the resulting Sb2Te3 nanoparticles as evidenced by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS). A comparison of the electrical and thermal conductivities as well as the Seebeck coefficient of the Sb2Te3 nanoparticles obtained from different ILs reveals the strong influence of the specific IL, from which C4mimI was identified as the best solvent, on the thermoelectric properties of as-prepared nanosized Sb2Te3. This work provides design guidelines for ILs, which allow the synthesis of nanostructured thermoelectrics with improved performances.

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Citation style:
Schaumann, J., Loor, M., Ünal, D., Mudring, A., Heimann, S., Hagemann, U., Schulz, S., Maculewicz, F., Schierning, G., 2016. Improving the zT value of thermoelectrics by nanostructuring: tuning the nanoparticle morphology of Sb2Te3 by using ionic liquids. https://doi.org/10.1039/C6DT04323B
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