High thermoelectric performance of two-dimensional SiPGaS/As heterostructures

Abstract

Thermoelectric technology holds great promise as a green and sustainable energy solution, generating electric power directly from waste heat. Herein, we investigate the thermoelectric properties of SiPGaS/As van der Waals...

A First-Principles Study of 2D Bi-Based BiOClBr, BiOClI, and BiOBrI Monolayers with Ultralow Lattice Thermal Conductivities for Thermoelectric Application

“…9,10 Therefore, researchers are committed to seeking various strategies to regulate the TE parameters and improve the TE properties: energy band engineering to change the electronic structure of the materials (doping, 11 strain, 12 etc. ), structural engineering to change the dimensionality of the materials (two-dimensional (2D) thin films, 13 construction of hetero-structures, 14 etc. ), scattering mechanism hindering phonon transport to reduce thermal conductivity (phonon local resonance mechanism, 15 special nanostructures, 16 strain, 17−19 etc.…”

“…The TE parameters show a complex-dependent relation with each other, e.g., the S and σ are negatively correlated while σ and κ e are positively correlated with changing the carrier’s doping concentration, thus generally resulting in a relatively low TE conversion efficiency. , Therefore, researchers are committed to seeking various strategies to regulate the TE parameters and improve the TE properties: energy band engineering to change the electronic structure of the materials (doping, strain, etc. ), structural engineering to change the dimensionality of the materials (two-dimensional (2D) thin films, construction of heterostructures, etc. ), scattering mechanism hindering phonon transport to reduce thermal conductivity (phonon local resonance mechanism, special nanostructures, strain, − etc.…”

Novel 2D ferroelastic SnNX (X = Cl, Br) monolayers with anisotropic high carrier mobility and excellent thermoelectric transport properties

“…[4][5][6] It is known that an ideal TE material should have synchronism of a high power factor (PF) sS 2 and low lattice thermal conductivity. [7][8][9][10] The electrical conductivity (s) is proportional to the carrier concentration, while the Seebeck coefficient tends to be opposite to the s and electronic thermal conductivity (k e ) also increases with an increase in the carrier concentration. Due to the coupling of the above-mentioned TE parameters with one another, the TE conversion efficiency of TE materials is relatively low.…”