Perspective in thermoelectric power generation: materials to device development

Thermoelectric power generators based on Seebeck effect enable direct conversion of heat into electrical energy and can be more desirable for small scale power production. Development of efficient thermoelectric power generators requires synthesis of n- and p-type thermoelectric materials with high figure-of-merit (ZT); preparation of ohmic contacts between thermoelements and metallic interconnects along with maximum transfer of heat through the thermoelements. To develop high ZT thermoelectric materials, decoupling of interdependent thermoelectric parameters i.e. electrical conductivity, Seebeck coefficient and thermal conductivity is required. The present talk will highlight the various recent strategies employed by our group to enhance the ZT of various thermoelectric materials. The development work of thermoelectric power generators going on in Technical Physics Division, BARC required for various applications will be highlighted. (author)