A large amount of electrical energy consumed is released as waste heat from industrial and residential areas leading to global warming. As per a recent estimation, about 60 TWh is lost as waste heat from industries annually. Recovering just 2% of this waste heat can reduce about 0.5 Trillion grams of CO 2 emission into the environment [ 1 ] . This process of recovering the heat can increase system efficiency and lower power consumption. The conventional technique of converting the heat into electricity is used by the Rankine cycle heat engines, where the system maintenance and the size stands as a major problem for practical applications [ 2 ] . Solid-state semiconductor devices called Thermoelectric Generators (TEG) are explored in recent times for their excellent heat to electricity conversion efficiency [ 3 ] . TEGs works on the principle of seebeck effect, an applied temperature difference across the device induces the development of a voltage called seebeck voltage. TEGs doesn’t...