1 research outputs found
Anisotropic Thermoelectric Response in Two-Dimensional Puckered Structures
Two-dimensional
semiconductor materials with puckered structure
offer a novel playground to implement nanoscale thermoelectric, electronic,
and optoelectronic devices with improved functionality. Using a combination
of approaches to compute the electronic and phonon band structures
with Green’s function based transport techniques, we address
the thermoelectric performance of phosphorene, arsenene, and SnS monolayers.
In particular, we study the influence of anisotropy in the electronic
and phononic transport properties and its impact on the thermoelectric
figure of merit <i>ZT</i>. Our results show no strong electronic
anisotropy, but a strong thermal one, the effect being most pronounced
in the case of SnS monolayers. This material also displays the largest
figure of merit at room temperature for both transport directions,
zigzag (<i>ZT</i> ∼ 0.95) and armchair (<i>ZT</i> ∼ 1.6), thus hinting at the high potential of these new materials
in thermoelectric applications