Enhanced thermoelectricity of three-dimensionally mesostructured BixSb2−xTe3 nanoassemblies: from micro-scaled open gaps to isolated sealed mesopores. Issue 9 (22nd February 2017)

• Record Type: Journal Article
• Authors: Chen, Tsung-Han; Lin, Ping-Yu; Chang, Hsiu-Cheng; Chen, Chun-Hua
• Is Part Of: Nanoscale. Volume 9:Issue 9(2017)
• Page Start: 3283
• Page End: 3292
• Publication Date: 2017-02-22
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c7nr00132k
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : An innovative concept of unique air–solid nanoscaled interfaces from isotropically arranged mesopores to anisotropically aligned gaps was proposed for thermoelectric enhancement. Abstract : We describe an innovative interfacial design concept and nanostructuring of novel Bi x Sb2− x Te3 (BST) nanoassembled films comprising unique air–solid interfaces from micro-scaled open gaps to isolated sealed mesopores, and high-quality solid–solid ones including the coherent grain boundaries and specific twins, utilizing pulsed laser deposition (PLD), for potentially activating multiple thermoelectric enhancing mechanisms. The unusual mesopore embedded BST films exhibit the highest power factor of ∼33 μW cm −1 K −2, which is comparable to or higher than the previously reported values for BST, and the corresponding relatively low thermal diffusivity in contrast to that for dense pore-less BST films evidently reveals the crucial role of the three-dimensionally and densely arranged air–solid interfaces in significantly arising the phonon scattering.