Colloidal AgSbSe2 nanocrystals: surface analysis, electronic doping and processing into thermoelectric nanomaterials

Y. Liu, D. Cadavid, M. Ibanez Sabate, J. De Roo, S. Ortega, O. Dobrozhan, M. Kovalenko, A. Cabot, Journal of Materials Chemistry C 4 (2016) 4756–4762.

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Journal Article | Published | English
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Abstract
We present a high-yield and scalable colloidal synthesis to produce monodisperse AgSbSe2 nanocrystals (NCs). Using nuclear magnetic resonance (NMR) spectroscopy, we characterized the NC surface chemistry and demonstrate the presence of surfactants in dynamic exchange, which controls the NC growth mechanism. In addition, these NCs were electronically doped by introducing small amounts of bismuth. To demonstrate the technological potential of such processed material, after ligand removal by means of NaNH2, AgSbSe2 NCs were used as building blocks to produce thermoelectric (TE) nanomaterials. A preliminary optimization of the doping concentration resulted in a thermoelectric figure of merit (ZT) of 1.1 at 640 K, which is comparable to the best ZT values obtained with a Pb- and Te-free material in this middle temperature range, with the additional advantage of the high versatility and low cost associated with solution processing technologies.
Publishing Year
Date Published
2016-04-13
Journal Title
Journal of Materials Chemistry C
Volume
4
Page
4756 - 4762
IST-REx-ID

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Liu Y, Cadavid D, Ibanez Sabate M, et al. Colloidal AgSbSe2 nanocrystals: surface analysis, electronic doping and processing into thermoelectric nanomaterials. Journal of Materials Chemistry C. 2016;4:4756-4762. doi:10.1039/c6tc00893c
Liu, Y., Cadavid, D., Ibanez Sabate, M., De Roo, J., Ortega, S., Dobrozhan, O., … Cabot, A. (2016). Colloidal AgSbSe2 nanocrystals: surface analysis, electronic doping and processing into thermoelectric nanomaterials. Journal of Materials Chemistry C, 4, 4756–4762. https://doi.org/10.1039/c6tc00893c
Liu, Yu, Doris Cadavid, Maria Ibanez Sabate, Jonathan De Roo, Silvia Ortega, Oleksandr Dobrozhan, Maksym Kovalenko, and Andreu Cabot. “Colloidal AgSbSe2 Nanocrystals: Surface Analysis, Electronic Doping and Processing into Thermoelectric Nanomaterials.” Journal of Materials Chemistry C 4 (2016): 4756–62. https://doi.org/10.1039/c6tc00893c.
Y. Liu et al., “Colloidal AgSbSe2 nanocrystals: surface analysis, electronic doping and processing into thermoelectric nanomaterials,” Journal of Materials Chemistry C, vol. 4, pp. 4756–4762, 2016.
Liu Y, Cadavid D, Ibanez Sabate M, De Roo J, Ortega S, Dobrozhan O, Kovalenko M, Cabot A. 2016. Colloidal AgSbSe2 nanocrystals: surface analysis, electronic doping and processing into thermoelectric nanomaterials. Journal of Materials Chemistry C. 4, 4756–4762.
Liu, Yu, et al. “Colloidal AgSbSe2 Nanocrystals: Surface Analysis, Electronic Doping and Processing into Thermoelectric Nanomaterials.” Journal of Materials Chemistry C, vol. 4, Royal Society of Chemistry, 2016, pp. 4756–62, doi:10.1039/c6tc00893c.

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