Graphene inclusion induced ultralow thermal conductivity and improved figure of merit in p-type SnSe.

The concept of composite material has been increasingly applied for the significant improvement in the thermoelectric performance because of the predictable effective medium properties and the unique interfacial correlated thermal and electrical transport mechanism. Herein, we report that the graphene inclusion can lead to a significant reduction in thermal conductivity and improve the overall thermoelectric figure-of-merit in SnSe. We demonstrate a systematic investigation on the microstructures and electrical and thermoelectric properties of the SnSe/graphene composite.

Significant Improvement in Electrical Conductivity and Figure of Merit of Nanoarchitectured Porous SrTiO by La Doping Optimization.

SrTiO is a well-studied -type metal oxide based thermoelectric (TE) material. In this work, the first-principles calculation of La-doped SrTiO has been performed using the density functional theory. In addition, high TE properties of bulk SrTiO material have been achieved by introducing nanoscale porosity and optimizing carrier concentration by La doping.

Enhancing the Thermoelectric Performance of Polycrystalline SnSe by Decoupling Electrical and Thermal Transport through Carbon Fiber Incorporation.

Thermoelectric (TE) materials have attracted extensive interest because of their ability to achieve direct heat-to-electricity conversion. They provide an appealing renewable energy source in a variety of applications by harvesting waste heat. The record-breaking figure of merit reported for single crystal SnSe has stimulated related research on its polycrystalline counterpart.

Enhancement of thermoelectric properties of La-doped SrTiO bulk by introducing nanoscale porosity.

Electron-doped SrTiO is a well-known -type thermoelectric material, although the figure of merit of SrTiO is still inferior compared with -type metal oxide-based thermoelectric materials due to its high lattice thermal conductivity. In this study, we have used a different amount of the non-ionic surfactant F127 during sample preparation to introduce nanoscale porosities into bulk samples of La-doped SrTiO. It has been observed that the porosities introduced into the bulk sample significantly improve the Seebeck coefficient and reduce the thermal conductivity by the charge carrier and phonon scattering respectively.