article published yes Maria Ibáñez author 43C61214-F248-11E8-B48F-1D18A9856A870000-0001-5013-2843 Roger Hasler author Aziz Genç author Yu Liu author 2A70014E-F248-11E8-B48F-1D18A9856A870000-0001-7313-6740 Beatrice Kuster author Maximilian Schuster author Oleksandr Dobrozhan author Doris Cadavid author Jordi Arbiol author Andreu Cabot author Maksym V. Kovalenko author MaIb department ISTplus - Postdoctoral Fellowships project The bottom-up assembly of colloidal nanocrystals is a versatile methodology to produce composite nanomaterials with precisely tuned electronic properties. Beyond the synthetic control over crystal domain size, shape, crystal phase, and composition, solution-processed nanocrystals allow exquisite surface engineering. This provides additional means to modulate the nanomaterial characteristics and particularly its electronic transport properties. For instance, inorganic surface ligands can be used to tune the type and concentration of majority carriers or to modify the electronic band structure. Herein, we report the thermoelectric properties of SnTe nanocomposites obtained from the consolidation of surface-engineered SnTe nanocrystals into macroscopic pellets. A CdSe-based ligand is selected to (i) converge the light and heavy bands through partial Cd alloying and (ii) generate CdSe nanoinclusions as a secondary phase within the SnTe matrix, thereby reducing the thermal conductivity. These SnTe-CdSe nanocomposites possess thermoelectric figures of merit of up to 1.3 at 850 K, which is, to the best of our knowledge, the highest thermoelectric figure of merit reported for solution-processed SnTe. https://research-explorer.ista.ac.at/download/6586/6587/JACS_April2019.pdf application/pdfno American Chemical Society2019 eng 0002-7863 1520-5126 31017419 00046929230000410.1021/jacs.9b01394 141208025-8029 Ibáñez M, Hasler R, Genç A, et al. Ligand-mediated band engineering in bottom-up assembled SnTe nanocomposites for thermoelectric energy conversion. <i>Journal of the American Chemical Society</i>. 2019;141(20):8025-8029. doi:<a href="https://doi.org/10.1021/jacs.9b01394">10.1021/jacs.9b01394</a> Ibáñez, Maria, Roger Hasler, Aziz Genç, Yu Liu, Beatrice Kuster, Maximilian Schuster, Oleksandr Dobrozhan, et al. “Ligand-Mediated Band Engineering in Bottom-up Assembled SnTe Nanocomposites for Thermoelectric Energy Conversion.” <i>Journal of the American Chemical Society</i>. American Chemical Society, 2019. <a href="https://doi.org/10.1021/jacs.9b01394">https://doi.org/10.1021/jacs.9b01394</a>. Ibáñez M, Hasler R, Genç A, Liu Y, Kuster B, Schuster M, Dobrozhan O, Cadavid D, Arbiol J, Cabot A, Kovalenko MV. 2019. Ligand-mediated band engineering in bottom-up assembled SnTe nanocomposites for thermoelectric energy conversion. Journal of the American Chemical Society. 141(20), 8025–8029. Ibáñez, M., Hasler, R., Genç, A., Liu, Y., Kuster, B., Schuster, M., … Kovalenko, M. V. (2019). Ligand-mediated band engineering in bottom-up assembled SnTe nanocomposites for thermoelectric energy conversion. <i>Journal of the American Chemical Society</i>. American Chemical Society. <a href="https://doi.org/10.1021/jacs.9b01394">https://doi.org/10.1021/jacs.9b01394</a> M. Ibáñez <i>et al.</i>, “Ligand-mediated band engineering in bottom-up assembled SnTe nanocomposites for thermoelectric energy conversion,” <i>Journal of the American Chemical Society</i>, vol. 141, no. 20. American Chemical Society, pp. 8025–8029, 2019. M. Ibáñez, R. Hasler, A. Genç, Y. Liu, B. Kuster, M. Schuster, O. Dobrozhan, D. Cadavid, J. Arbiol, A. Cabot, M.V. Kovalenko, Journal of the American Chemical Society 141 (2019) 8025–8029. Ibáñez, Maria, et al. “Ligand-Mediated Band Engineering in Bottom-up Assembled SnTe Nanocomposites for Thermoelectric Energy Conversion.” <i>Journal of the American Chemical Society</i>, vol. 141, no. 20, American Chemical Society, 2019, pp. 8025–29, doi:<a href="https://doi.org/10.1021/jacs.9b01394">10.1021/jacs.9b01394</a>. 65862019-06-25T11:53:35Z2025-04-14T07:44:06Z