Ultralow thermal conductivity and enhanced thermoelectric properties of SnTe based alloys prepared by melt spinning technique

Ultralow Lattice Thermal Conductivity and Enhanced Mechanical Properties of Cu and Sb Co-Doped SnTe Thermoelectric Material with a Complex Microstructure Evolution

“…In addition, an all-time high Vickers microhardness value of 165 Hv is reported (Figure (f)). This value is by far higher than previously reported in other high performance SnTe-based works and is graphically presented in Figure S8. ,,− This is thought to be contributed to by reduced Sn vacancies, precipitate hardening, and solid-solution strengthening which not only introduces strain but also alters bonding with Sb co-doping. The observed enhancement of the thermoelectric performance in SnTe through Cu and Sb co-doping continue to portray the potential of SnTe-based materials for application as mitigators for global climatic changes through emission-free recovery of waste heat to useful electrical power.…”

Enhanced thermoelectric performance in high-defect SnTe alloys: a significant role of carrier scattering

“…Finally, the Cdsubstituted point defects (Cd Sn ) further scattered phonons and the lowest k l of ∼0.6 W m −1 K −1 at 723 K was achieved in the Sn 1−y Cd y Te-0.08Sb 2 Te 3 sample, which is comparable to those of other Sb/Cd doped SnTe materials. 29,33,42,43,[65][66][67] Combined with band structure tuning and microscale defects, Sb 2 Te 3 and Cd were introduced successively to achieve signicant thermoelectric performance optimization in the full temperature region. As shown in Fig.…”

General strategies to improve thermoelectric performance with an emphasis on tin and germanium chalcogenides as thermoelectric materials

“…As a result κ lattice gets reduced and S enhanced, leading to a better TE performance. Studies of Sn 1− x Sb 2 x Te 1+2 x materials synthesized by melt spinning and SPS technique were done by Yang et al 221 An ultralow κ lattice of ∼0.57 Wm −1 K −1 at 773 K and the maximum PF of 24.2 μW cm −1 K −2 at 823 K for Sn 0.91 Sb 0.18 Te 1.18 ( x = 0.09) was achieved. For the same sample, ZT ∼ 0.95 at 823 K was reported, which is 2.2 times higher than that of pure SnTe alloy.…”