Wearable Thermoelectric Devices Based on Au-Decorated Two-Dimensional MoS 2 .

Two-dimensional materials have recently opened a new avenue to flexible thermoelectric materials with enhanced performance due to their unique electronic transport properties. Here, we report a feasible approach to improve the thermoelectric performance of transition metal dichalcogenides by effectively decorating two-dimensional MoS with Au nanoparticles using in-situ growth. The present Au decorated MoS assembled heterojunction system shows a certain decoupled phenomenon, i.e., the Seebeck coefficient and conductivity increased simultaneously. This is due to the occurrence of p-type doping of the MoS 2H phase and injection energy filtering of dopant-originated carriers around the local band bending at the interface. The composite flexible films can achieve a power factor value of 166.3 μWmK at room temperature, which have great potential for harvesting human body heat.