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Effect of Rare-Earth Cation Doping on Enhancement of The Thermoelectric Power of Zinc Oxide

Published online by Cambridge University Press:  01 February 2011

Kiyoshi Fuda  and
Shigeaki Sugiyama
Kiyoshi Fuda
Affiliation:
fudak@ipc.akita-u.ac.jp, Akita University, Tegatagakuen-Cho 1-1, Akita, Akita, 010-8502, Japan
Shigeaki Sugiyama
Affiliation:
sugiyama@akita-iri.pref.akita.jp
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Abstract

We investigated the effects of doping of rare-earth ions (Ce, Pr, Nd, Sm, and Eu) on the thermoelectric properties of ZnO, especially Seebeck coefficient in the temperature range from 100 to 800 °C. The data were scattered more or less depending on the doping species, but it was commonly found that the rare-earth doped samples showed higher Seebeck coefficients with compared to those for Al-doped samples. The highest values were observed for Nd-doped one ranging from -360 to -400μVK−1 in the temperature range observed, the lowest ones for Pr-doped one ranging from -250 to -310 μVK−1, whereas those for Al-doped one ranging from -80 to -140 μVK−1. It should also be pointed out that the power factor at 100 °C for Pr-doped ZnO was twice or more as much as that for Al-doped one. From the results it seemed that rare earth doping is effective for enhancement of thermoelectric power of ZnO.

Keywords

thermoelectricityZnoxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 886: Symposium F – Materials and Technologies fore Direct Thermal-to-Electric Energy Conversion , 2005 , 0886-F11-15
Copyright
Copyright © Materials Research Society 2006

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References

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