Controlling Metallurgical Phase Separation Reactions of the Ge0.87Pb0.13Te Alloy for High Thermoelectric Performance. Issue 6 (20th March 2013)

• Record Type: Journal Article
• Authors: Gelbstein, Yaniv; Davidow, Joseph; Girard, Steven N.; Chung, Duck Young; Kanatzidis, Mercouri
• Is Part Of: Advanced energy materials. Volume 3:Issue 6(2013:Jun.)
• Page Start: 815
• Page End: 820
• Publication Date: 2013-03-20
• Subjects: Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201200970
• Languages: English
• ISSNs: 1614-6832

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 <italic>p</italic>‐type Ge_0.87Pb_0.13Te composition. Very high <italic>ZT</italic>s of up 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 <italic>n</italic>‐type (Pb_0.95Sn_0.05Te)_0.92(PbS)_0.08 composition, a maximal efficiency value of ∼11.5% was theoretically calculated. These <italic>ZT</italic> and efficiency values are among the highest reported for single composition non‐segmented bulk material legs.</p> </abstract>