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Enhanced thermoelectric performance of Ag 0.8 Pb 18 SbTe 20 alloyed with Se
Author(s) -
Su Taichao,
Zhou Youmo,
Li Hongtao,
Li Shangsheng,
Li Xiaolei,
Deng Le,
Su Yantao,
Liu Jian,
Sui Yu,
Ma Hongan,
Jia Xiaopeng
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127501
Subject(s) - thermoelectric effect , seebeck coefficient , materials science , electrical resistivity and conductivity , thermal conductivity , analytical chemistry (journal) , figure of merit , thermoelectric materials , thermodynamics , composite material , optoelectronics , chemistry , physics , chromatography , quantum mechanics
Thermoelectric materials Ag 0.8 Pb 18 SbTe 20 alloyed with Se in the composition of Ag 0.8 Pb 18 SbTe 20– x Se x ( x = 0, 5, 10, 15) were prepared by a high‐pressure method. The composition dependence of transport properties was studied from 100 K to room temperature. The thermal conductivity of Ag 0.8 Pb 18 SbTe 20 was depressed sharply by alloying with Se, and the Seebeck coefficient and resistivity were tuned effectively by adjusting the Se content. The maximum figure of merit ZT = 0.43 was obtained at x = 10, which is about 70% higher than that of the unalloyed sample.