Stable n-type thermoelectric multilayer thin films with high power factor from carbonaceous nanofillers

High power factor n-type organic thermoelectric nanocomposites are assembled by alternately depositing double walled-nanotubes (DWNT), stabilized by polyethyleneimine (PEI), and graphene stabilized by polyvinylpyrrolidone (PVP), from water using the layer-by-layer (LbL) assembly technique. This unique combination of carbon nanomaterials exhibits an electrical conductivity of 300 S cm⁻¹ and a relatively stable power factor of 190 μW m⁻¹ K⁻² at room temperature.