title: Enhanced thermoelectric performance of Nb-doped SrTiO3 by nano-inclusion with low thermal conductivity.
abstract: Authors reported an effective path to increase the electrical conductivity while to decrease the thermal conductivity, and thus to enhance the ZT value by nano-inclusions. By this method, the ZT value of Nb-doped SrTiO3 was enhanced 9-fold by yttria stabilized zirconia (YSZ) nano-inclusions. YSZ inclusions, located inside grain and in triple junction, can reduce the thermal conductivity by effective interface phonon scattering, enhance the electrical conductivity by promoting the abnormal grain growth, and thus lead to the obvious enhancement of ZT value, which strongly suggests that, it is possible to not only reduce the thermal conductivity, but also increase the electrical conductivity by nano-inclusions with low thermal conductivity. This study will give some useful enlightenment to the preparation of high-performance oxide thermoelectric materials.
authors: University of Electronic Science and Technology of China, State Key Laboratory of Electronic Thin Films and Integrated Devices, Chengdu, 610054, P. R. China.
authors: Ning
authors: N
authors: Wang
authors: Haijun
authors: H
authors: Chen
authors: Hongcai
authors: H
authors: He
authors: Wataru
authors: W
authors: Norimatsu
authors: Michiko
authors: M
authors: Kusunoki
authors: Kunihito
authors: K
authors: Koumoto