Bipolar conduction asymmetries lead to ultra-high thermoelectric power factor

Thermoelectric Power Factor of Ultra-Narrow Silicon Nanowires

The thermoelectric performance of materials is determined by the figure of merit ZT=σS2/(κe+κl), where σ is the electrical conductivity, S is the Seebeck coefficient and κe and κl are the electronic and lattice contributions to the thermal conductivity, respectively. The interrelation between these quantities has traditionally kept ZT low, around unity. Nanomaterials have recently attracted sig...

High Thermoelectric Power Factor of High‐Mobility 2D Electron Gas

Thermoelectric conversion is an energy harvesting technology that directly converts waste heat from various sources into electricity by the Seebeck effect of thermoelectric materials with a large thermopower (S), high electrical conductivity (σ), and low thermal conductivity (κ). State-of-the-art nanostructuring techniques that significantly reduce κ have realized high-performance thermoelectri...

High thermoelectric power factor in two-dimensional crystals of MoS2

Kedar Hippalgaonkar,1,2,3 Ying Wang,1 Yu Ye,1 Diana Y. Qiu,2,4 Hanyu Zhu,1 Yuan Wang,1,2 Joel Moore,2,4 Steven G. Louie,2,4 and Xiang Zhang1,2,* 1NSF Nano-scale Science and Engineering Center (NSEC), 3112 Etcheverry Hall, University of California, Berkeley, California 94720, USA 2Material Sciences Division, Lawrence Berkeley National Laboratory (LBNL), 1 Cyclotron Road, Berkeley, California 947...

Metastable conduction states in Mo2S3: Pulse conductivity and thermoelectric power.

Numerical study of the thermoelectric power factor in ultra-thin Si nanowires

Low dimensional structures have demonstrated improved thermoelectric (TE) performance because of a drastic reduction in their thermal conductivity, κl . This has been observed for a variety of materials, even for traditionally poor thermoelectrics such as silicon. Other than the reduction in κl , further improvements in the TE figure of merit ZT could potentially originate from the thermoelectr...