Bulk defects and related physical effects in thermoelectric materials. (a–c) Introduction of energy filtering effect in Yb0.26
/nano-GaSb composites, which increases the Seebeck coefficient [25
]. Reproduced with permission from Elsevier Ltd. (d, e) Introduction of the influence of magnetic inclusions on carrier transport behavior in the (d) ferromagnetic state and (e) superparamagnetic state, respectively [132
]. Reproduced with permission from Springer Nature.