期刊
ADVANCED ENERGY MATERIALS
卷 3, 期 6, 页码 815-820出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201200970
关键词
GeTe; PbTe; phase separation; thermoelectric
类别
资金
- United States-Israel Binational Science Foundation (BSF) [2008114]
- Revolutionary Materials for Solid State Energy Conversion, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001054]
- US Department of Energy, Office of Basic Energy Sciences [DE-AC02-06CH11357]
We demonstrate the potential of metallurgical controlling of the phase separation reaction, by means of spark plasma sintering consolidation and subsequently controlled heat treatments sequence, for enhancement the thermoelectric properties of the p-type Ge0.87Pb0.13Te composition. Very high ZTs of up to approximate to 2, attributed to the nucleation of sub-micron phase separation domains and to comparable sized twinning and dislocation networks features, were observed. Based on the experimentally measured transport properties, combined with the previously reported phase separated n-type (Pb0.95Sn0.05Te)0.92(PbS)0.08 composition, a maximal efficiency value of approximate to 11.5% was theoretically calculated. These ZT and efficiency values are among the highest reported for single composition non-segmented bulk material legs.
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