Non-equilibrium strategy for enhancing thermoelectric properties and improving stability of AgSbTe2

Suppressing Ag2Te nanoprecipitates for enhancing thermoelectric efficiency of AgSbTe2

“…Notably, no Ag 2 Te peak can be observed, which is in contrast to typical scans from AgSbTe 2 samples. 28 This observation can be ascribed to the phase diagram in Fig. 1 which shows that with increasing annealing temperature above 633 K, Ag 2 Te-deficient samples tend to form a stable phase of Ag 1−x Sb 1+x Te 2+x .…”

“…Notable among these are compounds based on GeTe, SnSe, Cu 2 Se, Mg 3 Sb 2 , and AgSbTe 2 . [25][26][27][28][29][30][31][32][33][34][35][36][37] In particular, AgSbTe 2 can potentially be used for both near room temperature and medium temperature applications, making it a versatile high performance thermoelectric material. [38][39][40][41][42][43][44][45][46] Due to the high intrinsic Seebeck coefficient and low intrinsic thermal conductivity, high thermoelectric performance can be achieved in AgSbTe 2 even in the absence of doping.…”

Janus 2H-MXTe (M = Zr, Hf; X = S, Se) monolayers with outstanding thermoelectric properties and low lattice thermal conductivities

“…10(c), that S declines dramatically at low carrier concentrations with the excitation of carriers at high temperatures, and the peak value of S shifts towards higher carrier concentrations. Compared to the common Janus TE materials, such as PbSSe with 6% strain (209.52 μV K −1 ), 69 MoSSe (240 μV K −1 ), 70 SnSSe with 8% strain (189.03 μV K −1 ), 71 and AgSbTe 2 (250 μV K −1 at ∼ 330 K), 72 Janus MXTe monolayers with similar S values will possess excellent TE performance.…”

Grain boundary re-crystallization and sub-nano regions leading to high plateau figure of merit for Bi2Te3 nanoflakes

“…17 In the past decades, significant development of thermoelectric technology has focused on the enhancement of zT. [18][19][20] The zT is highly temperature-dependent, 21,22 which determines their applicability to function under different scenarios and temperature regions. According to the application temperature region, thermoelectric materials can be categorized into near roomtemperature (T o 500 K), mid-temperature (500 r T o 800 K), and high-temperature (T Z 800 K) types.…”