Enhanced thermoelectricity of three-dimensionally mesostructured BixSb2-xTe3 nanoassemblies: From micro-scaled open gaps to isolated sealed mesopores

Tsung Han Chen, Ping Yu Lin, Hsiu Cheng Chang, Chun-Hua Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We describe an innovative interfacial design concept and nanostructuring of novel BixSb2-xTe3 (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.

Original languageEnglish
Pages (from-to)3283-3292
Number of pages10
JournalNanoscale
Volume9
Issue number9
DOIs
StatePublished - 7 Mar 2017

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