The energy conversion involving thermoelectricity, that is the ability of certain materials of generating a difference of potential when a gradient of temperature is present, could be in principle a useful way of recovering the energy dissipated in form of heat in any device. The efficiency of the thermoelectric energy conversion is maximized in correspondence of high values of the thermoelectric figure of merit ZT. Together with the simple temperature to voltage conversion, good charge carriers transport and low phonon transport, resulting in high electrical conductivity and low thermal conductivity, are essential requirements to obtain an efficiency for practical applications. 2D materials are known to be good candidates for thermoelectric conversion due to their different- dimensionality density of states.