Glass-like thermal conductivity in SrTiO3 thermoelectrics induced by a-site vacancies

Srinivasa Rao Popuri (1) , Alexander J. Scott (1) , Ruth Downie (1) , A. J. Michael Hall (1) , Emmanuelle Suard (2) , Rodolphe Decourt (3) , Michaël Pollet (3) , Jan-Willem Bos (1)

1 Institute of Chemical Sciences and Centre for Advanced Energy Storage and Recovery
2 ILL - Institut Laue-Langevin
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

The introduction of A-site vacancies in SrTiO3 results in a glass-like thermal conductivity while Nb substituted samples maintain good electrical conductivity. This unexpected result brings SrTiO3 one step closer to being a high-performing phonon-glass electron-crystal thermoelectric material.

Domaines: Matériaux

Srinivasa Rao Popuri, Alexander J. Scott, Ruth Downie, A. J. Michael Hall, Emmanuelle Suard, et al.. Glass-like thermal conductivity in SrTiO3 thermoelectrics induced by a-site vacancies. RSC Advances, 2014, 4 (64), pp.33720-33723. ⟨10.1039/C4RA06871H⟩. ⟨hal-01060341⟩