Cation Modulation in AgSbTe2 Realizes Carrier Optimization, Defect Engineering, and a 7% Single‐Leg Thermoelectric Efficiency
Bo‐Chia Chen,
Kuang‐Kuo Wang,
Hsin‐Jay Wu
Abstract:AgSbTe2 plays a pivotal role in mid‐temperature thermoelectric generators (TEGs). Leveraging the seminal advances in cation manipulation within AgSbTe2, this study demonstrates an enhanced TE power factor (PF = S2σ) of 1.5 mWm−1 K−2 and a peak zT of 1.5 at 583 K in an off‐stoichiometric Ag1.04Sb0.96Te2 crystal. The introduction of Ge in place of Ag leads to an increased nH as evidenced by the detection of trace Ge4+ through XPS analysis. Further chemical state analysis reveals the simultaneous presence of Ag+,… Show more
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