Article (Scientific journals)
Electronic Properties as a Function of Ag/Sb Ratio in Ag1-yPb18Sb1+zTe20 Compounds
Dadda, Jayaram; Mueller, Eckhard; Klobes, Benedikt et al.
2012In Journal of Electronic Materials, 41 (8), p. 2065-2072
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Abstract :
[en] In this study efforts have been made to optimize the electronic properties such as the electrical conductivity and Seebeck coefficient of Ag1- (y) Pb18Sb1+ (z) Te-20 (lead-antimony-silver-tellurium, LAST-18) compounds by systematically varying the Ag and Sb compositions with constant Pb/Te ratio. It was found that increasing the content of Sb relative to Ag raised the charge carrier density (n) and thereby the electrical conductivity and power factor. The results indicate that, for deficient Ag, the excess trivalent Sb atoms occupy divalent Pb sites in the unit cell, increasing the value of n in the system. It was established that the Seebeck coefficient decreases with increasing n indicating a dominant acoustic phonon scattering mechanism in the current alloys. The results demonstrate that the interaction between Ag and Sb atoms plays a major role in determining the electronic properties in the current Ag1-y Pb18Sb1+z Te-20 compounds.
Disciplines :
Physics
Author, co-author :
Dadda, Jayaram
Mueller, Eckhard
Klobes, Benedikt
Bauer, Pereira Paula
Hermann, Raphaël ;  Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)
Language :
English
Title :
Electronic Properties as a Function of Ag/Sb Ratio in Ag1-yPb18Sb1+zTe20 Compounds
Publication date :
2012
Journal title :
Journal of Electronic Materials
ISSN :
0361-5235
eISSN :
1543-186X
Publisher :
Springer, New-York, United States - New York
Volume :
41
Issue :
8
Pages :
2065-2072
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 14 December 2012

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