High-temperature characteristics of Seebeck coefficients for AlInN alloys grown by metalorganic vapor phase epitaxy

摘要

The Seebeck coeeficients of AlInN alloys, grown by metalorganic vapor phase epitaxy, with In-contents (x) from 0.38% up to 21.34%, were characterized and analyzed from room temperature (T=300 K) up to high temperature (T= 382 K). The Seebeck coefficients of the n-type AlInN alloys show significant enhancement at higher temperature up to 382 K, in comparison to those measured at room temperature. Large Seebeck coefficients (602.0- 1233.2 μV/K) were obtained for the lattice-matched Al_(0.83)In_(0.17)N alloy (n = 5.1 x 10~18 cm-3) from T = 300 K up to T = 382 K. The improvement of Seebeck coefficients for the n-type AlInN alloys will lead to ~ 1.5-4 times improvement of the thermopower at higher temperatures.