Thermoelectric Transport in Sb2Te3/Bi2Te3 Quantum Dot Nanocomposites

Bottleneck Effect ◽

Phonon Bottleneck ◽

We investigate the thermoelectric transport properties of Sb2Te3/Bi2Te3 quantum dot nanocomposites with spherical Sb2Te3 quantum dots arrays embedded in Bi2Te3 matrix through a two-channel transport model. In this model, the transport of quantum-confined electrons through the hopping mechanism is studied by tight-binding model together with Kubo formula and Green’s function method. The formation of minibands due to the quantum confinement and the phonon-bottleneck effect on carrier-phonon scattering are considered. The transport of bulk-like electrons is studied by Boltzmann-transport-equation-based model. We consider the intrinsic carrier scatterings as well as the carrier-interface scattering of these bulk-like electrons. Thermoelectric transport properties are studied with different quantum dot sizes, inter-dot distances, doping concentrations, and temperatures. We find that electrical conductivity and Seebeck coefficient can be enhanced simultaneously in Sb2Te3/Bi2Te3 quantum dot nanocomposites because of the formation of minibands and the phonon-bottleneck effect on carrier-phonon scattering. Our results could shed some light on the design of high-efficiency thermoelectric materials.

Thermoelectric transport properties of a T-coupled quantum dot: Atomic approach for the finite U case

Physica E Low-dimensional Systems and Nanostructures ◽

10.1016/j.physe.2014.06.024 ◽

2014 ◽

Vol 64 ◽

pp. 39-44 ◽

Cited By ~ 2

Author(s):

E. Ramos ◽

R. Franco ◽

J. Silva-Valencia ◽

M.S. Figueira

Keyword(s):

Quantum Dot ◽

Transport Properties ◽

Tuned thermoelectric transport properties of Co2.0Sb1.6Se2.4 and Co2.0Sb1.5M0.1Se2.4 (M=Zn, Sn): Compounds with high phonon scattering

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2017.09.136 ◽

2017 ◽

Vol 729 ◽

pp. 303-312 ◽

Cited By ~ 3

Author(s):

N. Karthikeyan ◽

Sivaprasad Ghanta ◽

Samiran Misra ◽

G. Jaiganesh ◽

Partha Pratim Jana ◽

...

Keyword(s):

Transport Properties ◽

Phonon Scattering ◽

Thermoelectric Properties of the Half-Heusler Compound (Zr,Hf)(Ni,Pd)Sn

MRS Proceedings ◽

10.1557/proc-545-403 ◽

1998 ◽

Vol 545 ◽

Cited By ~ 12

Author(s):

V. M. Browning ◽

S. J. Poon ◽

T. M. Tritt ◽

A. L Pope ◽

S. Bhattacharya ◽

...

Keyword(s):

Thermal Conductivity ◽

Transport Properties ◽

Figure Of Merit ◽

Phonon Scattering ◽

Lattice Contribution ◽

Heusler Compound ◽

Chemical Substitution ◽

Seebeck Coefficients ◽

AbstractRecent measurements of the thermoelectric transport properties of a series of the half- Heusler compound ZrNiSn are presented. These materials are known to be bandgap intermetallic compounds with relatively large Seebeck coefficients and semimetallic to semiconducting transport properties. This makes them attractive for study as potential candidates for thermoelectric applications. In this study, trends in the thermoelectric power, electrical conductivity and thermal conductivity are examined as a function of chemical substitution on the various fcc sub-lattices that comprise the half-Heusler crystal structure. These results suggest that the lattice contribution to the thermal conductivity may be reduced by increasing the phonon scattering via chemical substitution. The effects of these substitutions on the overall power factor and figure-of-merit will also be discussed.

Universality and thermoelectric transport properties of quantum dot systems

Physical Review B ◽

10.1103/physrevb.103.085112 ◽

2021 ◽

Vol 103 (8) ◽

Author(s):

D. F. Aranguren-Quintero ◽

E. Ramos ◽

J. Silva-Valencia ◽

M. S. Figueira ◽

L. N. Oliveira ◽

...

Keyword(s):

Quantum Dot ◽

Transport Properties ◽

Thermoelectric transport properties through a single-walled zig–zag carbon nanotube side coupled to a correlated quantum dot: Atomic approach for the finite U-impurity Anderson model

Physica B Condensed Matter ◽

10.1016/j.physb.2014.07.056 ◽

2014 ◽

Vol 455 ◽

pp. 99-102

Author(s):

Edwin Ramos ◽

Roberto Franco ◽

Jereson Silva-Valencia ◽

Marcos Sergio Figueira

Keyword(s):

Carbon Nanotube ◽

Quantum Dot ◽

Transport Properties ◽

Anderson Model ◽

High-temperature thermoelectric transport behavior of the Al/γ-Al2O3interface: impact of electron and phonon scattering at nanoscale metal–ceramic contacts

Physical Chemistry Chemical Physics ◽

10.1039/c8cp01374h ◽

2018 ◽

Vol 20 (21) ◽

pp. 14513-14524 ◽

Cited By ~ 4

Author(s):

Pabitra Narayan Samanta ◽

Jerzy Leszczynski

Keyword(s):

High Temperature ◽

Transport Properties ◽

Phonon Scattering ◽

Transport Behavior ◽

Ballistic Electron ◽

Metal Ceramic ◽

Thermoelectric transport properties of the Al/γ-Al2O3interface have been assessed from the ballistic electron and phonon transmission at the nanoscale contacts.