Forming solid solutions is one of the most effective strategies to suppress the thermal conductivity of thermoelectric materials. However, the accompanying increase in impurity ion scattering usually results in an undesirable loss in hall mobility, negatively impacting the electrical transport properties. In this work, a tellurium-selenium (Te-Se) solid solution with trace antimony (Sb) doping was synthesized via the high pressure and high temperature method.
View Article and Find Full Text PDFACS Appl Mater Interfaces
May 2020
Misfit-layered CaCoO as a p-type semiconductor is difficult to commercialize because of its relatively poor performance. Here, CaLaAgCoO/Ag composites prepared by spark plasma sintering were systematically investigated in terms of La dopant levels and nano-sized Ag compacts. Multiscale microstructures of stacking fault, dislocation, and oxygen vacancy-linked defects could be recognized as an effective strategy for tuning the transport of charge carriers and phonon scattering.
View Article and Find Full Text PDFCubic AgSbTe₂ compound is a metastable phase within Ag₂Te-Sb₂Te₃ pseudo-binary phase diagram and theoretically rapid cooling molten elements to room temperature may be an effective way to obtain it. In this work, thick films composed of 5⁻10 nm fine grains were developed by a melt spinning technique. The formation mechanism of the nanostructure and its influences on the thermoelectric properties have been studied and correlated.
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