Thermoelectric properties of $n$-type SrTiO3

TL;DR

This paper investigates the thermoelectric properties of n-type SrTiO3 using theoretical calculations and experimental data, predicting a high figure of merit (ZT) at optimal doping and high temperatures.

Contribution

It combines Boltzmann transport theory with experimental data to model and predict thermoelectric performance of SrTiO3, highlighting potential improvements through doping optimization.

Findings

Predicted ZT of 0.7 at 1400 K with optimized doping

Model suggests ZT can be improved from current experimental values

High ZT achievable at elevated temperatures with proper doping

Abstract

We present an investigation of the thermoelectric properties of cubic perovskite SrTiO3. The results are derived from a combination of calculated transport functions obtained from Boltzmann transport theory in the constant scattering time approximation based on the electronic structure and existing experimental data for La-doped SrTiO3. The figure of merit ZT is modeled with respect to carrier concentration and temperature. The model predicts a relatively high $ZT$ at optimized doping, and suggests that the $ZT$ value can reach 0.7 at T = 1400 K. Thus $ZT$ can be improved from the current experimental values by carrier concentration optimization.