Large Seebeck coefficients in Iron-oxypnictides : a new route towards n-type thermoelectric materials

TL;DR

This paper explores iron-oxypnictide compounds that exhibit large Seebeck coefficients and good electrical conductivity, indicating potential for thermoelectric cooling applications near liquid nitrogen temperatures.

Contribution

It introduces iron-oxypnictides as a new class of n-type thermoelectric materials with promising thermoelectric properties.

Findings

Seebeck coefficients around -100 microV/K

Peak power factor at low temperatures

Potential for thermoelectric cooling near liquid nitrogen temperatures

Abstract

The iron-oxypnictide compounds, recently reported as a new class of superconductors when appropriately doped, exhibit large Seebeck coefficients, of the order of -100 microV/K, while keeping good electrical conductivity. Their power factor shows a peak at low temperatures, suggesting possible applications of these materials in thermoelectric cooling modules in the liquid nitrogen temperature range.