Enhancement of thermoelectric performance of beta -Zn sub(4)Sb sub(3) through resonant distortion of electronic density of states doped with Gd

Enhancement of thermoelectric performance of beta -Zn sub(4)Sb sub(3) through resonant distortion of electronic density of states doped with Gd

The thermoelectric properties of Gd-doped beta -Zn sub(4)Sb sub(3) are investigated. The results indicate that Gd-doping not only causes a 41 mu V K super(-1) increase in thermopower owing to resonant distortion of DOS but also results in similar to 15% reduction in thermal conductivity at a doping...

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Veröffentlicht in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-05, Vol.3 (22), p.11768-11772
Hauptverfasser: Ren, Baojin, Liu, Mian, Li, Xiaoguang, Qin, Xiaoying, Li, Di, Zou, Tianhua, Sun, Guolong, Li, Yuanyue, Xin, Hongxing, Zhang, Jian
Format: Artikel
Sprache:eng
Schlagworte:
Density of states
Distortion
Doping
Electronics
Heat transfer
Reduction
Sustainability
Thermal conductivity
Thermoelectricity
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Zusammenfassung:The thermoelectric properties of Gd-doped beta -Zn sub(4)Sb sub(3) are investigated. The results indicate that Gd-doping not only causes a 41 mu V K super(-1) increase in thermopower owing to resonant distortion of DOS but also results in similar to 15% reduction in thermal conductivity at a doping content of 0.2%. Consequently, a largest value of ZT= 1.2 is achieved at 655 K.
ISSN:2050-7488
2050-7496
DOI:10.1039/c5ta01778e