Thermoelectric properties of B-doped SrTiO3 singe crystal

Effect of boron on the electric and thermoelectric properties of SrTiO3 has been studied. Boron-doped SrTiO3 was prepared by vacuum annealing of SrTiO3 single crystals in presence of boron vapors. The crystals show low resistivity ~0.1 Ωcm and high Seebeck coefficient of several hundreds μV/K at a room temperature. It was estimated that almost every boron atom incorporated in SrTiO3 crystal provided a charge carrier. Temperature dependence of Seebeck coefficient and figure of merit ZT were measured as a function of carrier concentration.