Nanostructured rocksalt-type solid solution series (Ge1−xSnxTe)nSb2Te3 (n=4, 7, 12; 0≤x≤1): Thermal behavior and thermoelectric properties

High-resolution transmission electron micrographs of (GeTe)4Sb2Te3 (top) and (Ge0.5Sn0.5Te)4Sb2Te3 (bottom) with different nanostructures and thermoelectric figures of merit (ZT) of these samples.