Fig. 4: Performance of the Zintl phase device.
From: CALPHAD accelerated design of advanced full-Zintl thermoelectric device
a The zT values for n-type Mg3.15Co0.05SbBi0.99Se0.01 and p-type Yb0.9Mg0.9Zn1.198Ag0.002Sb2. b Finite-element-simulated maximum efficiency (ηmax) as a function of the cross-sectional area ratio of the p- and n-type legs (Ap/An) Solid lines: n-type Mg3.15Co0.05SbBi0.99Se0.01 with p-type Zintl phase materials69,70,71,72,73,74,75,76,77,78,79. Dashed lines: n-type Mg3.15Co0.05SbBi0.99Se0.01 with other p-type materials80,81,82,83,84,85. c Temperature-dependent expansion behaviors of n-type Mg3.15Co0.05SbBi0.99Se0.01 compared with different p-type materials90 and their connection materials in the range of 293-773 K. d Simulated ηmax as a function of the cross-sectional area ratio of the p- and n-type legs (Ap/An) and the ratio of height to the total cross-sectional area of the legs (H/Apn). e Measured voltage (U) and output power (P) as a function of current (I) at different temperatures. f The experimental and calculated conversion efficiency as a function of I at different hot-side temperatures. Insets: optical images of the Zintl phase device.
