Abstract
The basic needs of the society were food, water and energy. The nexus between food, water and energy is unavoidable. Energy is the key element for the survival of all the living beings on the Earth. Energy crisis and environment deterioration are the two most faced glitches of the current scenario. Thermo electricity is one of the promising solutions for energy crisis that is experiencing in this 21st century. This particular article gives the brief description about the principle of thermoelectric devices and their necessity, classification and the applications of thermoelectric generators (TEG's). Also, this paper gives a short description on materials, design and optimization of TEG's. It concludes with the future research direction in the realm of thermo electricity generation.
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