Title :
Transport properties of heavily doped n-type CoSb3
Author :
Nagamoto, Y. ; Tanaka, K. ; Koyanagi, T.
Author_Institution :
Dept. of Electr. & Electron. Eng., Yamaguchi Univ., Ube, Japan
Abstract :
The transport properties of heavily Te-doped n-type CoSb3 polycrystalline samples have been studied. We performed measurements of the electrical conductivity, the Seebeck coefficient and the Hall coefficient. The Seebeck coefficient was compared with the calculated results. The observed temperature dependence of the Seebeck coefficient was in good agreement with the calculated result assuming two conduction bands. The values of the second band effective mass and the ratio of the carrier mobilities in their bands were estimated. From this result, it was found that the second band played an important role of the large Seebeck coefficient and therefore the large figure of merit
Keywords :
Hall effect; Seebeck effect; carrier mobility; cobalt compounds; conduction bands; effective mass; electrical conductivity; heavily doped semiconductors; tellurium; thermal conductivity; CoSb3:Te; Hall coefficient; Seebeck coefficient; carrier mobilities; conduction bands; electrical conductivity; heavily Te-doped n-type CoSb3; large figure of merit; second band effective mass; Conducting materials; Lattices; Light scattering; Magnetic field measurement; Plasma temperature; Powders; Tellurium; Thermal conductivity; Thermoelectricity; X-ray scattering;
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-4907-5
DOI :
10.1109/ICT.1998.740378
