Fig. 1: Design strategy and high physical properties of the cubic GeSe-based TE materials and devices.
From: Metavalent alloying and vacancy engineering enable state-of-the-art cubic GeSe thermoelectrics
a Illustration of design strategy for cubic GeSe: metavalent V2VI3 alloying with high solid solubility and additional cation vacancy49. Here Orth. refers to the orthorhombic structure, while Rhom. represents the rhombohedral structure. b Alloying content (x) and configurational entropy (ΔS) required for obtaining cubic GeSe studied herein in comparison with literature data26,38,43,47 (the bar chart corresponds to x and the red line represents ΔS). c Comparison of peak ZT of this work and reported works24,26,33,34,35,36,37,38,40,41,42,43,64. d Energy conversion efficiency (η) of single-leg GeSe-based device under various temperature differences (∆T) in comparison with literature data36.
