The importance of surface adsorbates in solution‐processed thermoelectric materials: the case of SnSe

Liu Y, Calcabrini M, Yu Y, Genç A, Chang C, Costanzo T, Kleinhanns T, LEE S, Llorca J, Cojocaru‐Mirédin O, Ibáñez M. The importance of surface adsorbates in solution‐processed thermoelectric materials: the case of SnSe. Advanced Materials., 2106858.


Journal Article | Accepted | English
Abstract
Solution synthesis of particles emerged as an alternative to prepare thermoelectric materials with less demanding processing conditions than conventional solid-state synthetic methods. However, solution synthesis generally involves the presence of additional molecules or ions belonging to the precursors or added to enable solubility and/or regulate nucleation and growth. These molecules or ions can end up in the particles as surface adsorbates and interfere in the material properties. This work demonstrates that ionic adsorbates, in particular Na⁺ ions, are electrostatically adsorbed in SnSe particles synthesized in water and play a crucial role not only in directing the material nano/microstructure but also in determining the transport properties of the consolidated material. In dense pellets prepared by sintering SnSe particles, Na remains within the crystal lattice as dopant, in dislocations, precipitates, and forming grain boundary complexions. These results highlight the importance of considering all the possible unintentional impurities to establish proper structure-property relationships and control material properties in solution-processed thermoelectric materials.
Publishing Year
Date Published
2021-10-08
Journal Title
Advanced Materials
Acknowledgement
Y. L. and M. C. contributed equally to this work. This work was financially supported by IST Austria and the Werner Siemens Foundation. Y.L. acknowledges funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 754411. M.C. has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 665385. J.L. is a Serra Húnter Fellow and is grateful to ICREA Academia program. C.C. acknowledges funding from the FWF "Lise Meitner Fellowship" grant agreement M 2889-N.
Article Number
2106858
IST-REx-ID

Cite this

Liu Y, Calcabrini M, Yu Y, et al. The importance of surface adsorbates in solution‐processed thermoelectric materials: the case of SnSe. Advanced Materials. doi:10.1002/adma.202106858
Liu, Y., Calcabrini, M., Yu, Y., Genç, A., Chang, C., Costanzo, T., … Ibáñez, M. (n.d.). The importance of surface adsorbates in solution‐processed thermoelectric materials: the case of SnSe. Advanced Materials. Wiley. https://doi.org/10.1002/adma.202106858
Liu, Yu, Mariano Calcabrini, Yuan Yu, Aziz Genç, Cheng Chang, Tommaso Costanzo, Tobias Kleinhanns, et al. “The Importance of Surface Adsorbates in Solution‐processed Thermoelectric Materials: The Case of SnSe.” Advanced Materials. Wiley, n.d. https://doi.org/10.1002/adma.202106858.
Y. Liu et al., “The importance of surface adsorbates in solution‐processed thermoelectric materials: the case of SnSe,” Advanced Materials. Wiley.
Liu Y, Calcabrini M, Yu Y, Genç A, Chang C, Costanzo T, Kleinhanns T, LEE S, Llorca J, Cojocaru‐Mirédin O, Ibáñez M. The importance of surface adsorbates in solution‐processed thermoelectric materials: the case of SnSe. Advanced Materials., 2106858.
Liu, Yu, et al. “The Importance of Surface Adsorbates in Solution‐processed Thermoelectric Materials: The Case of SnSe.” Advanced Materials, 2106858, Wiley, doi:10.1002/adma.202106858.
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