Enhancement of thermoelectric properties of La-doped SrTiO₃ bulk by introducing nanoscale porosity.

ABSTRACT: Electron-doped SrTiO₃ is a well-known n-type thermoelectric material, although the figure of merit of SrTiO₃ is still inferior compared with p-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 SrTiO₃. 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. Therefore, there is an overall enhancement in the power factor (PF) followed by a dimensionless figure of merit (zT) o

SUBMITTER: Ahmed AJ 

PROVIDER: S-EPMC6837226 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature