Thermoelectric Properties of Doped (ZnO)mIn2O3
The thermoelectric properties of layer-structured homologous compounds of (ZnO)mIn2O3 ($m$ is an integer) were investigated in terms of the detailed dependence of the molar ratio of ZnO to In2O3, $n$ (=ZnO/In2O3), and of doping, such as with Ba2+, Ca2+, Sr2+, and Sn4+, for an In site. Except for the Ba and Sr dopings, all sintered specimens with $n\geq 3$ were found to be in the phases of (ZnO)mIn2O3. The highest power factor apparently existed around $n=3$ while the thermal conductivity was minimum at the range from $n=3.5$ to 5. The Ca doping effectively reduced the thermal conductivity, resulting in a dimensionless figure of merit of 0.23 (at 1053 K) for $n=3.5$, which was relatively high among n-type oxides.
- Japanese journal of applied physics. Pt. 1, Regular papers & short notes
Japanese journal of applied physics. Pt. 1, Regular papers & short notes 43(6A), 3540-3543, 2004-06-15
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physics