Thermoelectric properties of lattice-matched AlInN alloy grown by metal organic chemical vapor deposition

Thermoelectric properties of lattice-matched AlInN grown by metal organic chemical vapor deposition were measured and analyzed. The n-type $Al0.83In0.17N$ alloy exhibited thermal conductivity of 4.87 W/(m K) measured by $3ω$ differential method. The Seebeck coefficient of $n-Al0.83In0.17N$ was measured as $−6.012×10−4V/K$ by thermal gradient method. The sheet resistivity of $n-Al0.83In0.17N$ was measured by using Van der Pauw method, and the electrical conductivity was measured as $2.38×104/(Ωm)$⁠. The thermoelectric figure of merit $(Z∗T)$ of n-type $Al0.83In0.17N$ was measured as 0.532 at room temperature $(T=300K)$⁠. The finding indicates lattice-matched AlInN alloy on GaN as excellent material candidate for thermoelectric application.