• Corpus ID: 239885471

Enhanced Thermoelectric ZT in the Tails of the Fermi Distribution via Electron Filtering by Nanoinclusions -- Model Electron Transport in Nanocomposites

  title={Enhanced Thermoelectric ZT in the Tails of the Fermi Distribution via Electron Filtering by Nanoinclusions -- Model Electron Transport in Nanocomposites},
  author={S. Aria Hosseini and Devin Coleman and Sabah K. Bux and P. Alex Greaney and Lorenzo Mangolini},
Silicon carbide nanoparticles with diameters around 8 nm and with narrow size distribution have been finely mixed with doped silicon nanopowders and sintered into bulk samples to investigate the influence of nanoinclusions on electrical and thermal transport properties. We have compared the thermoelectric properties of samples ranging from 0–5% volume fraction of silicon carbide. The silicon carbide nanoinclusions lead to a significant improvement in the thermoelectric figure of merit, ZT… 

Figures from this paper


Effects of nanoscale porosity on thermoelectric properties of SiGe
The recent achievement of the high thermoelectric figure of merit in nanograined materials is attributed to the successful optimization of the consolidation process. Despite a thermal conductivity
Electron energy filtering by a nonplanar potential to enhance the thermoelectric power factor in bulk materials
We present a detailed theory on electron energy filtering by the nonplanar potential introduced by dispersed nanoparticles or impurities in bulk materials for enhancement of the thermoelectric power
Electron transport modeling and energy filtering for efficient thermoelectric Mg2Si1-xSnx solid solutions
We present a comprehensive electron transport model to analyze thermoelectric properties of both nand p-type bulk Mg2Si1-xSnx (0 x 1) solid solutions. A temperature-dependent multiparabolic bands
Nanostructured Bulk Silicon as an Effective Thermoelectric Material
Thermoelectric power sources have consistently demonstrated their extraordinary reliability and longevity for deep space missions and small unattended terrestrial systems. However, more efficient
Thermoelectric performance of silicon with oxide nanoinclusions
ABSTRACT Silicon nanoparticles produced via a plasma-based technique have been sintered into bulk nanostructured samples. These samples have micron-sized crystalline domains and contain
Heat current anticorrelation effects leading to thermal conductivity reduction in nanoporous Si
Prevailing nanostructuring strategies focus on increasing phonon scattering and reducing the mean-free-path of phonons across the spectrum. In nanoporous Si materials, for example, boundary
Enhanced Seebeck coefficient through energy-barrier scattering in PbTe nanocomposites
Resistivity, Seebeck coefficient, and Hall measurements were performed on densified nanocrystalline composite materials of undoped and Ag-doped PbTe nanocrystals to investigate the physical
Modeling study of thermoelectric SiGe nanocomposites
Nanocomposite thermoelectric materials have attracted much attention recently due to experimental demonstrations of improved thermoelectric properties over those of the corresponding bulk material.
Large-scale molecular dynamics investigation of geometrical features in nanoporous Si
Nanoporous materials are of broad interest for various applications, in particular, advanced thermoelectric materials. The introduction of nanoscale porosity, even at modest levels, has been known to
Monte Carlo simulation of transport in technologically significant semiconductors of the diamond and zinc-blende structures. I. Homogeneous transport
Monte Carlo simulations of electron transport in seven semiconductors of the diamond and zinc-blende structure (Ge, Si, GaAs, InP, AlAs, InAs, GaP) and some of their alloys (Al/sub x/Ga/sub 1-x/As,