A comprehensive review on the output voltage/power of wearable thermoelectric generators concerning their geometry and thermoelectric materials

Wearable thermoelectric generators (TEGs) are considered as a promising power supply for low wearable electronics. To obtain high (TE) generation, the focus should be on two main factors, including TE materials and configurations of legs. Concerning these this paper provides comprehensive review recent studies TEGs. In general, can classified into three categories, inorganic, organic, hybrid (inorganic-organic). addition, legs prepared in different configurations, ingot-shaped, film-shaped, yarn-shaped. Based reviewed literatures, superior output powers all were achieved by hybrid, organic materials, respectively. It noted that ingot- yarn-shaped mostly composed inorganic Whereas, types almost equally used to prepare film-shaped Regarding density, ingot-shaped stood first followed film- legs, Precisely, at µW/cm2 level, dropping nW/cm2