Thermoelectric properties of the layered oxyselenide La1-xSrxCuOSe

Abstract

Electrical conductivity and Seebeck coefficient of the layered oxyselenide La1-xSrxCuOSe (x = 0.00－0.20) were measured in a temperature range of 373－673 K in a flowing N2 gas. The non-doped LaCuOSe showed the p-type degenerate semiconducting behavior with the conductivities of ∼100 Ω-1cm-1, whereas the Sr-doped materials with x = 0.05－0.20 showed the p-type metallic behavior. Thermoelectric power factors were estimated to be 1.0－1.4×10-4 Wm-1K-2 for the sample with x = 0.05.