Figure 4

The mean relative error in three parameters of module performance, averaged over 276 TEPs: (left) maximum power density P/A and the corresponding electric current I where the maximum is attained, (center) maximum efficiency \(\eta\) and the corresponding electric current I where the maximum is attained, (right) maximum zT and the corresponding temperature T where the maximum is attained. The error bars indicate the 95% CIs for population mean.