TITLE

Theoretical studies on the thermoelectric figure of merit of nanograined bulk silicon

AUTHOR(S)
Qing Hao; Gaohua Zhu; Giri Joshi; Xiaowei Wang; Minnich, Austin; Zhifeng Ren; Gang Chen
PUB. DATE
August 2010
SOURCE
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p063109
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this paper, we investigate the phonon transport in silicon nanocomposites using Monte Carlo simulations considering frequency-dependent phonon mean free paths, and combine the phonon modeling with electron modeling to predict the thermoelectric figure of merit (ZT) of silicon nanocomposites. The model shows that while grain interface scattering of phonons is negligible for large grain sizes around 200 nm, ZT can reach 1.0 at 1173 K if the grain size can be reduced to 10 nm. Our results show the potential of obtaining a high ZT in bulk silicon by the nanocomposite approach.
ACCESSION #
52929597

 

Related Articles

  • Hot phonons contribution to Joule heating in single-walled carbon nanotubes. Gautreau, Pierre; Ragab, Tarek; Basaran, Cemal // Journal of Applied Physics;Nov2012, Vol. 112 Issue 10, p103527 

    The influence of hot phonons on the electron-phonon scattering rate and Joule heating is studied via an ensemble Monte Carlo (EMC) simulation with a step by step update of the phonon occupation number to account for the generation of hot phonons. The hot phonon contribution to Joule heating...

  • Monte-Carlo-based spectral gain analysis for terahertz quantum cascade lasers. Jirauschek, Christian; Lugli, Paolo // Journal of Applied Physics;Jun2009, Vol. 105 Issue 12, p123102-1 

    Employing an ensemble Monte Carlo transport simulation, we self-consistently analyze the spectral gain for different terahertz quantum cascade laser structures, considering bound-to-continuum as well as resonant phonon depopulation designs. In this context, we investigate temperature dependent...

  • Spin relaxation in bilayer graphene: the role of electron-electron scattering. Katiyar, Saurabh; Ghosh, Bahniman; Salimath, Akshay // Applied Physics A: Materials Science & Processing;Feb2016, Vol. 122 Issue 2, p1 

    This paper investigates the influence of electron-electron scattering on spin relaxation length in bilayer graphene using semiclassical Monte Carlo simulation. Both D'yakonov-P'erel and Elliot-Yafet mechanisms are considered for spin relaxation. It is shown that spin relaxation length decreases...

  • Simplified model for inelastic acoustic phonon scattering of holes in Si and Ge. Bufler, F. M.; Schenk, A.; Fichtner, W. // Journal of Applied Physics;9/1/2001, Vol. 90 Issue 5 

    An averaging procedure is applied to inelastic acoustic–phonon scattering which leads to lattice-temperature-dependent constants for the phonon energy and the square of the phonon wave vector. The resulting scattering rate depends on energy only thus facilitating the search of...

  • Influence of screening on longitudinal-optical phonon scattering in quantum cascade lasers. Ezhov, Ivan; Jirauschek, Christian // Journal of Applied Physics;2016, Vol. 119 Issue 3, p1 

    We theoretically investigate the influence of screening on electron-longitudinal optical phonon scattering in quantum cascade lasers. By employing ensemble Monte Carlo simulations, an advanced screening model based on the random-phase approximation is compared to the more elementary Thomas-Fermi...

  • Design and simulation of terahertz quantum cascade lasers. Ko¨hler, Ru¨deger; Iotti, Rita C.; Tredicucci, Alessandro; Rossi, Fausto // Applied Physics Letters;12/10/2001, Vol. 79 Issue 24, p3920 

    Strategies and concepts for the design of THz emitters based on the quantum cascade scheme are analyzed and modeled in terms of a fully three-dimensional Monte Carlo approach; this allows for a proper inclusion of both carrier-carrier and carrier-phonon scattering mechanisms. Starting from the...

  • Full-band Monte Carlo model with screened pseudopotential based phonon scattering rates for a lattice with basis. Nguyen, Phuong Hoa; Hofmann, Karl R.; Paasch, Gernot // Journal of Applied Physics;11/1/2002, Vol. 92 Issue 9, p5359 

    In advanced full-band Monte Carlo (MC) models, the Nordheim approximation with a spherical Wigner-Seitz cell for a lattice with two atoms per elementary cell is still common, and in the most detailed work on silicon by Kunikiyo et al. [J. Appl. Phys. 74, 297 (1994)], the atomic positions in the...

  • Full-band Monte Carlo model of electron and hole transport in strained Si including inelastic... Fischer, Bjorn; Hofmann, Karl R. // Applied Physics Letters;4/12/1999, Vol. 74 Issue 15, p2185 

    Features full-band Monte Carlo simulations of electron and hole transport in strained silicon including inelastic acoustic phonon scattering. In-plane lattice mobilities for electrons and for holes; Drift velocity and energy versus electric field characteristics given as reference for...

  • Critical path length for the similarity of elastic multiple scattering processes. Liljequist, D. // Journal of Applied Physics;7/15/1987, Vol. 62 Issue 2, p333 

    Presents a study that examined the spatial and angular distributions generated by different elastic electron scattering processes using the Monte Carlo method. Comparison of the spatial and angular distributions; Analysis of the longitudinal and transverse spatial distributions; Examination of...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics