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- Title
Enhancement of Thermoelectric Figure of Merit for BiSbTe by Metal Nanoparticle Decoration.
- Authors
Lee, Kyu-Hyoung; Kim, Hyun-Sik; Kim, Sang-Il; Lee, Eun-Sung; Lee, Sang-Mock; Rhyee, Jong-Soo; Jung, Jae-Yong; Kim, Il-Ho; Wang, Yifeng; Koumoto, Kunihito
- Abstract
Introducing nanoinclusions in thermoelectric (TE) materials is expected to lower the lattice thermal conductivity by intensifying the phonon scattering effect, thus enhancing their TE figure of merit ZT. We report a novel method of fabricating BiSbTe nanocomposite with nanoscale metal particles by using metal acetate precursor, which is low cost and facile to scale up for mass production. Ag and Cu particles of ∼40 nm were successfully near-monodispersed at grain boundaries of BiSbTe matrix. The well-dispersed metal nanoparticles reduce the lattice thermal conductivity extensively, while enhancing the power factor. Consequently, ZT was enhanced by more than 25% near room temperature and by more than 300% at 520 K compared with a BiSbTe reference sample. The peak ZT of 1.35 was achieved at 400 K for 0.1 wt.% Cu-decorated BiSbTe.
- Publication
Journal of Electronic Materials, 2012, Vol 41, Issue 6, p1165
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-012-1913-0