Thermoelectric conversion material and production method for thermoelectric conversion material

摘要

A thermoelectric conversion material having a novel composition is provided. The thermoelectric conversion material comprises a first dielectric material layer, a second dielectric material layer, and an electron localization layer that is present between the first dielectric material layer and the second dielectric material layer and that has a thickness of 1 nm.

主权项

1. A thermoelectric conversion material, comprising:
a first dielectric material layer comprising a SrTiO3 single crystal substrate; and a second dielectric material layer comprising a TiO2 or SrTiO3 thin film that is epitaxially grown on said first dielectric material layer, characterized in that an electron localization layer that is formed between said first dielectric material layer and second dielectric material layer, the electron localization layer having a thickness equal to or greater than 0.04 nm and equal to or less than 1 nm and a carrier electron density equal to or greater than 1×1020 cm−3, wherein a Seebeck coefficient is approximately between 3 and 8 times that in bulk of SrTiO3 or TiO2.