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) N-type carrier concentrations of some doped IV–VI compounds at room temperature: N-type IV–VI compounds (SnSe0.95+3%PbBr,[68] Bi:SnSe single crystal,[63] SnSe0.95+0.1%BiCl3,[69] Sn0.64Pb0.3Ti0.06Se,[66] Sn0.96Ti0.04Se,[66] Sn0.6In0.4Te,[67] and Pb0.9La0.1Te[70]), (b) P-type IV–VI compounds (SnSe single crystal,[19] Sn0.96Mn0.14Te,[21] SnSe polycrystalline,[39] Na0.01Pb0.09Te,[18] SnTe,[51] GeTe,[22] and Bi0.05Ge0.95Te[65]).