Laser co-ablation of bismuth antimony telluride and diamond-like carbon nanocomposites for enhanced thermoelectric performance. Issue 3 (19th December 2017)

• Record Type: Journal Article
• Authors: Chen, Tsung-Han; Chen, Po-Hung; Chen, Chun-Hua
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 3(2018)
• Page Start: 982
• Page End: 990
• Publication Date: 2017-12-19
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta08701b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A series of innovative heterogeneous nanocomposites comprising diamond-like carbon (DLC) clusters and well-aligned Bi–Sb–Te based nanoassemblies were realized for thermoelectric enhancement. Abstract : A novel design of thermoelectric hetero-nanocomposite films comprising well-aligned oriented (Bi, Sb)2 Te3 (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 also to effectively reduce the thermal transport as qualitatively evidenced by micro-Raman characterizations. The significantly enhanced Seebeck coefficients up to 550 μV K −1 and the corresponding power factor of ∼46 μW cm −1 K −2 revealed 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.