Recent advances in non-Pb-based group-IV chalcogenides for environmentally-friendly thermoelectric materials*

Project supported by the National Natural Science Foundation of China (Grant Nos. 51472052 and U1601213).
Du Bing-Sheng1, Jian Ji-Kang1, †, Liu Hai-Tao1, 2, Liu Jiao1, Qiu Lei1
       

(color online) [(a) and (e)] Electrical conductivities, [(b) and (f)] Seebeck coefficients, [(c) and (g)] power factors, and [(d) and (h)] zT values of SiS and SiSe each as a function of electron chemical potential εf at three different temperatures: T = 300, 500, and 700 K and along two anisotropic directions, respectively. Here εf refers to the valence band maximum of SiS or SiSe. (Reprinted (adapted) from Ref. [27] with permission from Copyright (2017) American Chemical Society).