ArticleSmall methods2026
Device-Level ZT Correlation for Validating Single-Leg Efficiency in GeTe Thermoelectrics.
Article in Small methods, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Although numerous high-zT GeTe systems have been reported, the correlation between zT and conversion efficiency η remains poorly defined. Reporting peak or even average zT often leads to an overestimation of η as these metrics assume temperature-independent transport properties-an unrealistic simplification. In 2017, the thermoelectric device ZT for a single material (making either n- or p-type leg) was introduced to evaluate the maximum efficiency of a thermoelectric leg with temperature-dependent properties. This work provides an experimental validation of Device ZT as a practical metric for predicting thermoelectric conversion efficiency. By combining calibrated single-leg efficiency measurements, heat-flow analysis, and finite-element simulations, we establish a direct correlation between material transport properties, Device zT, and experimentally measured device performance. The CuSb-GeTe leg achieves an efficiency of 5.4% at ΔT = 400 K, while conventional zT
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