It has been reported that the polycrystalline InTe possesses a high TE figure-of-merit (FOM) ZT of 0.9 and ultralow lattice thermal conductivity of ~0.3–0.4 Wm-1K− 1 at temperature of 600 K [16,17], which makes it promising for high performance TE applications. Besides, bulk InTe crystal is a semiconductor with a bandgap of 1.16 eV [