Enhanced thermoelectric performance through synergy of resonance levels and valence band convergence via Q/In (Q = Mg, Ag, Bi) co-doping

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Vol. 6; no. 6; pp. 2507 - 2516
• Main Authors: Zhang, Li Juan, Qin, Peng, Han, Chao, Wang, Jian Li, Ge, Zhen Hua, Sun, Qiao, Cheng, Zhen Xiang, Li, Zhen, Dou, Shi Xue
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 2018
• Subjects: bismuth; Carrier density; Convergence; Crystal defects; Doping; Electrical resistivity; Elongation; Figure of merit; Grain boundaries; High temperature; magnesium; neutrons; Point defects; Powder; Resonance; Screw dislocations; Seebeck effect; Silver; Sintering (powder metallurgy); temperature; Temperature dependence; Thermal conductivity; Thermoelectric materials; Transport properties; Valence band

The temperature-dependent evolution of heavy-hole valence band contribution to the Seebeck coefficients of SnTe-based thermoelectric materials is revealed in situ by neutron and synchrotron powder diffraction. The additional carriers with high effective mass are created in a heavy-hole valence band...