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Author Kwan-Ho Park ♦ Sin-Wook You ♦ Soon-Chul Ur ♦ Il-Ho Kim
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2006
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Iron ♦ Doping ♦ Scattering ♦ Electric resistance ♦ Thermal conductivity ♦ Thermoelectricity ♦ Semiconductor impurities ♦ Temperature dependence ♦ Semiconductivity ♦ Conducting materials
Abstract Fe-doped $CoSb_{3}$ skutterudites were prepared by encapsulated induction melting and their thermoelectric and electronic transport properties were investigated. The positive signs of Seebeck and Hall coefficients for all Fe-doped specimens revealed that Fe atoms successfully acted as p-type dopants by substituting Co atoms. Carrier concentration increased with increasing the Fe doping content and the Fe dopants could affect the electronic structure of $CoSb_{3}$ and generate excess holes. However, carrier mobility decreased with increasing the doping content, which indicates that the hole mean free path was reduced by the impurity scattering. Seebeck coefficient and electrical resistivity were almost independent of carrier concentration between $5.1times10^{18}$ and $1.2times10^{20}/cm^{3$because the increase in carrier concentration by doping was competitive with the decrease in carrier mobility by the impurity scattering. Seebeck coefficient showed a positive value at all temperatures examined and it increased as the temperature increased. Temperature dependence of electrical resistivity suggested that $Co_{1-x}Fe_{x}Sb_{3}$ is a highly degenerate semiconducting material. Thermal conductivity was considerably reduced by Fe doping and the lattice contribution was dominant in the Fe-doped $CoSb_{3}$ skutterudites
Description Author affiliation: Dept. of Mater. Sci. & Eng., Chungju Nat. Univ., Chungbuk (Kwan-Ho Park)
ISBN 1424408105
ISSN 10942734
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2006-08-06
Publisher Place Austria
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 222.46 kB
Page Count 4
Starting Page 435
Ending Page 438

Source: IEEE Xplore Digital Library