Tuning transport properties in thermoelectric nanocomposites through inorganic ligands and heterostructured building blocks

M. Ibáñez, A. Genç, R. Hasler, Y. Liu, O. Dobrozhan, O. Nazarenko, M. de la Mata, J. Arbiol, A. Cabot, M.V. Kovalenko, ACS Nano 13 (2019) 6572–6580.

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Journal Article | Published | English
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Abstract
Methodologies that involve the use of nanoparticles as “artificial atoms” to rationally build materials in a bottom-up fashion are particularly well-suited to control the matter at the nanoscale. Colloidal synthetic routes allow for an exquisite control over such “artificial atoms” in terms of size, shape, and crystal phase as well as core and surface compositions. We present here a bottom-up approach to produce Pb–Ag–K–S–Te nanocomposites, which is a highly promising system for thermoelectric energy conversion. First, we developed a high-yield and scalable colloidal synthesis route to uniform lead sulfide (PbS) nanorods, whose tips are made of silver sulfide (Ag2S). We then took advantage of the large surface-to-volume ratio to introduce a p-type dopant (K) by replacing native organic ligands with K2Te. Upon thermal consolidation, K2Te-surface modified PbS–Ag2S nanorods yield p-type doped nanocomposites with PbTe and PbS as major phases and Ag2S and Ag2Te as embedded nanoinclusions. Thermoelectric characterization of such consolidated nanosolids showed a high thermoelectric figure-of-merit of 1 at 620 K.
Publishing Year
Date Published
2019-06-25
Journal Title
ACS Nano
Volume
13
Issue
6
Page
6572-6580
ISSN
eISSN
IST-REx-ID

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Ibáñez M, Genç A, Hasler R, et al. Tuning transport properties in thermoelectric nanocomposites through inorganic ligands and heterostructured building blocks. ACS Nano. 2019;13(6):6572-6580. doi:10.1021/acsnano.9b00346
Ibáñez, M., Genç, A., Hasler, R., Liu, Y., Dobrozhan, O., Nazarenko, O., … Kovalenko, M. V. (2019). Tuning transport properties in thermoelectric nanocomposites through inorganic ligands and heterostructured building blocks. ACS Nano, 13(6), 6572–6580. https://doi.org/10.1021/acsnano.9b00346
Ibáñez, Maria, Aziz Genç, Roger Hasler, Yu Liu, Oleksandr Dobrozhan, Olga Nazarenko, María de la Mata, Jordi Arbiol, Andreu Cabot, and Maksym V. Kovalenko. “Tuning Transport Properties in Thermoelectric Nanocomposites through Inorganic Ligands and Heterostructured Building Blocks.” ACS Nano 13, no. 6 (2019): 6572–80. https://doi.org/10.1021/acsnano.9b00346.
M. Ibáñez et al., “Tuning transport properties in thermoelectric nanocomposites through inorganic ligands and heterostructured building blocks,” ACS Nano, vol. 13, no. 6, pp. 6572–6580, 2019.
Ibáñez M, Genç A, Hasler R, Liu Y, Dobrozhan O, Nazarenko O, Mata M de la, Arbiol J, Cabot A, Kovalenko MV. 2019. Tuning transport properties in thermoelectric nanocomposites through inorganic ligands and heterostructured building blocks. ACS Nano. 13(6), 6572–6580.
Ibáñez, Maria, et al. “Tuning Transport Properties in Thermoelectric Nanocomposites through Inorganic Ligands and Heterostructured Building Blocks.” ACS Nano, vol. 13, no. 6, ACS, 2019, pp. 6572–80, doi:10.1021/acsnano.9b00346.
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