The global energy crisis demands the search for new materials for efficient thermoelectric energy conversion. Theoretical predictive modelling with experiments can expedite the global search of novel and ecoconscious thermoelectric...
Two dimensional (2D) materials are emerging candidates
for thermoelectric
applications because of their exceptional electronic and mechanical
properties. A serious impediment to improving thermoelectric (TE)
efficiency is electrical (σ) and thermal (κ) conductivity,
which are related and cannot be tuned separately. In this study, we
have shown that the heterostructures of Janus MoSSe and graphene have
a negative correlation between electrical and thermal conductivity.
It is also possible to design both p-type and n-type legs by using
a pure and phosphorus-doped heterostructure. We obtained a power factor
of 3410 μW m–1 K–2 for p-type and 2450 μW m–1 K–2 for n-type cases at room temperature. The lattice
thermal conductivity is reduced to 13.28 W m–1 K–1 for pure and 8.36 W m–1 K–1 for the P-doped heterostructure from
17.32 W m–1 K–1 for
Janus MoSSe at 300 K. A promising figure of merit is obtained for
the 2D TE device made by Janus MoSSe and graphene heterostructures.
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