Fig. 5
From: Discovery of ZrCoBi based half Heuslers with high thermoelectric conversion efficiency

Measurement of output power density and thermoelectric conversion efficiency. a Experimental setup of a single-leg device. b The measured voltage, output power, input power and efficiency of the device with varying current. The cold-side and hot-side temperature of the device are fixed at ~323 and ~823 K, respectively. Hot-side-temperature-dependent output power density (normalized to the length of 2 mm) (c) and heat-to-electricity conversion efficiency (d). The cold-side temperature is fixed at 298 K for the calculation of output power density and conversion efficiency