Weng Weei Tjiu

1 Introduction Thermoelectric (TE) devices have the ability to directly convert heat into electricity, without the need for moving parts.[1, 2] The efficiency of a TE device is related to the dimensionless figure of merit (zT) which is defined as z T = S 2 σ T κ $zT = \frac{{{{S}^2}\sigma T}}{\kappa}$ , where S is the Seebeck coefficient, σ is the electrical conductivity, T is the absolute temperature, κ is the thermal conductivity, and S2σ is the power factor (PF) of the TE material.[2] A...