Enhanced thermoelectric properties in N-type Mg₂Si_0.4−xSn_0.6Sb_x synthesized by alkaline earth metal reduction

Abstract

Sb doped Mg2Si0.4Sn0.6 materials feature with lots of dislocations at grain boundaries and plenty of nanoscale Mg2Si–Mg2Sn spinodal phases, both of which can scatter heat carrying phonons and suppress the bipolar effects, with a optimal ZT of 1.42.

Controlled preparation of silicon and magnesium silicide on silica glass substrate through magnesiothermic reduction

“…26 Silicon is a key material applied in electronic, opto-and photoelectronic, and photovoltaic devices, while Mg 2 Si has recently received increased attention as a base material to fabricate thermoelectric devices, a negative electrode in Li-ion batteries, and the components of photovoltaic devices. [28][29][30][31][32][33][34][35] Thus, it becomes a challenge to fabricate selectively these materials on the silica glass substrates under the well-controlled conditions. 35 However, the reaction mechanism behind the magnesiothermic reduction remains unclear.…”