Materials that are configured in two-dimension (2D), such as hexagonal boron nitride ( hBN ) ,
graphene, phosphorene, and transition metal dichalcogenides (TMDs) (for example, WS2,MoS2,
etc.), have the attention of researchers in the last number of years. This to credit goes to their
extraordinary properties, and their various promising engineering applications. Graphene is known
for being a superb electrical conductor  including its high thermal conductivity  while hBN is a
poor conductor of electricity as well as an infinite thermal conductor, .
Nanomaterials graphene with two-dimensional configuration together with hexagonal boron nitride
( hBN )
have good heat transfer properties. Combining the dual due to the differences structure of the
electrons and crystal lattice, the new material formed has a van der Waals heterostructure or a planar
C-BN hybrid structure with novel thermal characteristics.
Recently, research groups worldwide have shown that by stacking crystals of two-dimensional(2D)
configurations with different properties, multi-layer materials can be created, the Van der Waals
Heterostructures ( vdWHs ) , characterised with electronic properties that are highly configurable .
2D materials with heterostructures, e.g., graphene/h-BN, MoS2/MoSe2, graphene/MoS2, and
MoS2/h-BN, is an interesting emerging topic of research. For instance, 2D heterostructures’
applications in management of thermal properties and generation of thermoelectric energy are
assuring. This is because of their attractive electrical and thermal transport characteristics. The
technological potential of vdWHs is stimulating worldwide research including significant investment
by industry, e.g., Samsung .
The application of vdWHs in thermo-electronics is still in research stage and more research is needed
to understand and perfect their thermoelectric properties. The fabrication of coplanar Graphene-hBN
heterostructures on large scale have been a success by the help of chemical vapor deposition ( CVD ) .
This has enabled the control of domains periodic arrangements with sizes of a range of tens of
nanometers to millimetres –. These large scale coplanar Graphene-hBN heterostructures
charge transport characteristics can be, however, utterly astonishing, like the having a metal
insulator transition – and phenomena of anomalous transport, that is not wholly
The unprecedented degree of tunability over the electronic properties of vdWHs suggests they are
ideally placed to observe and exploit thermoelectric phenomena. Thermoelectric phenomena include
the Peltier effect, where an electric potential difference can cause heating or cooling of material, and
the Seebeck effect, where a temperature gradient can generate an electrical potential difference.
These effects have been exploited in many technological applications: the Peltier effect is used to
cool electronic devices from supercomputers to camping fridges and, due to the absence of moving
parts, the Seebeck effect is exp...