Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/106204
Title: | Eco-friendly cerium-cobalt counter-doped Bi<sub>2</sub>Se<sub>3</sub> nanoparticulate semiconductor : synergistic doping effect for enhanced thermoelectric generation | Authors: | Musah, JD Or, SW Kong, LY Roy, VAL Wu, CML |
Issue Date: | Oct-2023 | Source: | Nanomaterials, Oct. 2023, v. 13, no. 20, 2738 | Abstract: | Metal chalcogenides are primarily used for thermoelectric applications due to their enormous potential to convert waste heat into valuable energy. Several studies focused on single or dual aliovalent doping techniques to enhance thermoelectric properties in semiconductor materials; however, these dopants enhance one property while deteriorating others due to the interdependency of these properties or may render the host material toxic. Therefore, a strategic doping approach is vital to harness the full potential of doping to improve the efficiency of thermoelectric generation while restoring the base material eco-friendly. Here, we report a well-designed counter-doped eco-friendly nanomaterial system (similar to 70 nm) using both isovalent (cerium) and aliovalent (cobalt) in a Bi2Se3 system for enhancing energy conversion efficiency. Substituting cerium for bismuth simultaneously enhances the Seebeck coefficient and electrical conductivity via ionized impurity minimization. The boost in the average electronegativity offered by the self-doped transitional metal cobalt leads to an improvement in the degree of delocalization of the valence electrons. Hence, the new energy state around the Fermi energy serving as electron feed to the conduction band coherently improves the density of the state of conducting electrons. The resulting high power factor and low thermal conductivity contributed to the remarkable improvement in the figure of merit (zT = 0.55) at 473 K for an optimized doping concentration of 0.01 at. %. sample, and a significant nanoparticle size reduction from 400 nm to similar to 70 nm, making the highly performing materials in this study (Bi2-xCexCo2x/3Se3) an excellent thermoelectric generator. The results presented here are higher than several Bi2Se3-based materials already reported. | Keywords: | Thermoelectric application Energy conversion Nanopartitulate Eco-friendly material Counter-doping |
Publisher: | Molecular Diversity Preservation International (MDPI) | Journal: | Nanomaterials | ISSN: | 2079-4991 | DOI: | 10.3390/nano13202738 | Rights: | © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). The following publication Musah J-D, Or SW, Kong L, Roy VAL, Wu C-ML. Eco-Friendly Cerium–Cobalt Counter-Doped Bi2Se3 Nanoparticulate Semiconductor: Synergistic Doping Effect for Enhanced Thermoelectric Generation. Nanomaterials. 2023; 13(20):2738 is available at https://dx.doi.org/10.3390/nano13202738. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
nanomaterials-13-02738.pdf | 5.67 MB | Adobe PDF | View/Open |
Page views
10
Citations as of Jun 30, 2024
Downloads
2
Citations as of Jun 30, 2024
SCOPUSTM
Citations
1
Citations as of Jun 21, 2024
WEB OF SCIENCETM
Citations
1
Citations as of Jul 4, 2024
![](/image/google_scholar.jpg)
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.