TY - JOUR
T1 - Thermoelectric properties of Ruddlesden-Popper phase n-type semiconducting oxides
T2 - La-, Nd-, and Nb-doped Sr3 Ti2O7
AU - Lee, Kyu Hyoung
AU - Wang, Yi Feng
AU - Kim, Sung Wng
AU - Ohta, Hiromichi
AU - Koumoto, Kunihito
PY - 2007/8
Y1 - 2007/8
N2 - We report herein on Ruddlesden-Popper-type doped Srn+1 TinO3n+1 (n =2) as a potential candidate for n-type thermoelectric (TE) oxides. The TE properties of 5at.% La-, Nd-, and Nb-doped Sr3Ti2O7 polycrystalline ceramics were investigated and the origin of Seebeck coefficient was discussed from the viewpoint of the symmetry of TiO6 octahedra. A significant reduction in the lattice thermal conductivity was observed by the enhancement of phonon scattering at SrO/(SrTiO3)n interfaces originating from the inherent superlattice structure, and the maximum dimensionless figure of merit, ZT ∼0.15, at a 1000K value was obtained in 5at.% La-doped Sr3Ti2O7.
AB - We report herein on Ruddlesden-Popper-type doped Srn+1 TinO3n+1 (n =2) as a potential candidate for n-type thermoelectric (TE) oxides. The TE properties of 5at.% La-, Nd-, and Nb-doped Sr3Ti2O7 polycrystalline ceramics were investigated and the origin of Seebeck coefficient was discussed from the viewpoint of the symmetry of TiO6 octahedra. A significant reduction in the lattice thermal conductivity was observed by the enhancement of phonon scattering at SrO/(SrTiO3)n interfaces originating from the inherent superlattice structure, and the maximum dimensionless figure of merit, ZT ∼0.15, at a 1000K value was obtained in 5at.% La-doped Sr3Ti2O7.
UR - http://www.scopus.com/inward/record.url?scp=34447537750&partnerID=8YFLogxK
U2 - 10.1111/j.1744-7402.2007.02147.x
DO - 10.1111/j.1744-7402.2007.02147.x
M3 - 文章
AN - SCOPUS:34447537750
SN - 1546-542X
VL - 4
SP - 326
EP - 331
JO - International Journal of Applied Ceramic Technology
JF - International Journal of Applied Ceramic Technology
IS - 4
ER -