Nanowerk May 1, 2023 To facilitate the development of thermoelectric modules for various operating temperature ranges, a connection technology that is suitable for heat-sensitive thermoelectric materials and capable of realizing both low-temperature connections and high-temperature service is required. Researchers at the University of Houston used low-temperature sintering of silver nanoparticles as an approach to connect the electrode and metallization layer of low- (Bi2Te3-based), medium- (PbTe-based) and high-temperature (half-Heusler-based) thermoelectric modules. Due to the low melting point of Ag nanoparticles and the high stability in the sintered bulk, the processing temperature of the module was decoupled from the operating temperature, avoiding […]
Tag Archives: Thermoelectricity
Team achieves 30-fold enhancement of thermoelectric performance in polycrystalline tin selenide
Phys.org March 28, 2022 Tin selenide (SnSe) is known to exhibit a record high energy conversion (ZT) in its single crystal form. However, the performance deteriorates in practical polycrystals because of a low electronic conductivity (σ) and a high thermal conductivity (κ). Researchers in Japan enhanced the ZT of polycrystalline SnSe by demonstrating a high σ and a low κ simultaneously by introducing tellurium (Te) ion into the structure of SnSe. The large-size Te ion in Sn(Se1−xTex) forms weak Sn-Te bonds, leading to the high-density formation of hole-donating Sn vacancies and the reduced phonon frequency and enhanced phonon scattering. This […]