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Laser co-ablation of bismuth antimony telluride and diamond-like carbon nanocomposites for enhanced thermoelectric performance

Abstract

A novel designation of thermoelectric hetero-nanocomposite films comprising well-aligned oriented (Bi,Sb)2Te3 (BST) nanocrystals and randomly-dispersed diamond-like carbon (DLC) clusters has been realized for the first time using dual-beam pulsed laser co-deposition on SiO2 insulated Si substrates. The simultaneously deposited DLC additives were found not only to successfully prevent the thermally induced rapid growth of BST for having consistent nanostructures across the whole BST:DLC film, but to effectively reduce the thermal transport as qualitatively evidenced by micro-Raman characterizations. The significantly enhanced Seebeck coefficients up to 550 μVK-1 and the corresponding power factor of ∼46 μWcm−1K−2 revealed are comparable to or higher than previously reported values for BST or BST-based nanocomposites, which evidently originated from the presence of multiple BST:DLC hetero-interfaces as clarified in the Pisarenko plot.

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Publication details

The article was received on 02 Oct 2017, accepted on 05 Dec 2017 and first published on 05 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA08701B
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Laser co-ablation of bismuth antimony telluride and diamond-like carbon nanocomposites for enhanced thermoelectric performance

    T. Chen, P. Chen and C. Chen, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA08701B

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