Sb2Te3 nanoparticles with enhanced seebeck coefficient and low thermal conductivity

Jing Chen, Ting Sun, Daohao Sim, Haiyang Peng, Huatao Wang, Shufen Fan, Huey Hoon Hng, Jan Ma, Freddy Yin Chang Boey, Sean Li, Majid Kabiri Samani, George Chung Kit Chen, Xiaodong Chen, Tao Wu, Qingyu Yan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

Nanostructured thermoelectric semiconductors represent a promising new direction that can further increase energy conversion efficiency, which requires the realization of thermoelectric nanocrystals with size comparable to their de Broglie wavelength while maintaining a high electrical conductivity. Here, we demonstrate a new facile process to grow self-assembled Sb2Te 3 nanoparticles with controlled particle size and enhanced thermoelectric properties by using a catalyst-free vapor transport growth technique. The samples show much more enhanced Seebeck coefficients than that of bulk Sb2Te3 with similar charge carrier concentration. Meanwhile, the thermal conductivity measurements with pulse photothermal reflectance suggest that the these Sb2Te3 nanoparticle films show much reduced thermal conductivity as compared to that of bulk Sb 2Te3. The discussed approach is promising for realizing new types of highly efficient thermoelectric semiconductors.

Original languageEnglish (US)
Pages (from-to)3086-3092
Number of pages7
JournalChemistry of Materials
Volume22
Issue number10
DOIs
StatePublished - May 25 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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