6533b831fe1ef96bd1298da9
RESEARCH PRODUCT
Thermal conductivity of thermoelectric Al-substituted ZnO thin films
Tino JaegerAnke WeidenkaffGerhard JakobChristian MixSascha PopulohNina Vogel-schäubleYaroslav E. Romanyuksubject
Materials scienceCondensed matter physicsbusiness.industryDopingSputter depositionCondensed Matter PhysicsThermoelectric materialsThermal conductivityElectrical resistivity and conductivityThermoelectric effectSapphireOptoelectronicsGeneral Materials ScienceThin filmbusinessdescription
ZnO:Al thin films with a low electrical resistivity were grown by magnetron sputtering on sapphire substrates. The cross-plane thermal conductivity (κ = 4.5 ± 1.3 W/mK) at room temperature is almost one order of magnitude lower than for bulk materials. The thermoelectric figure of merit ZT at elevated temperatures was estimated from in-plane power factor and the cross-plane thermal conductivity at room temperature. It is expected that the thermal conductivity drops with increasing temperature and is lower in-plane than cross-plane. Consequently, the thin film ZT is at least three times higher than for bulk samples at intermediate temperatures. (© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-03-14 | physica status solidi (RRL) - Rapid Research Letters |