Abstract
The incorporation of PbSnS2 in PbTe results in a tremendous reduction of the lattice thermal conductivity to 0.8 W/mK at room temperature, a reduction of almost 60% over bulk PbTe. Transmission electron microscopy reveals very high density displacement layers, misfit dislocations, and phase boundaries. Our thermal transport calculations based on modified Debye-Callaway model, well in agreement with the experimental measurements, reveal that the layer structured PbSnS2 plays an important role in reducing the lattice thermal conductivity.
Original language | English (US) |
---|---|
Pages (from-to) | 4440-4444 |
Number of pages | 5 |
Journal | Advanced Materials |
Volume | 24 |
Issue number | 32 |
DOIs | |
State | Published - Aug 22 2012 |
Keywords
- displacement layers
- lattice thermal conductivity
- phonon scattering
- thermoelectric materials
- transmission electron microscopy
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- General Materials Science