Fig. 4

The calculated Seebeck coefficient for AlxGa1-xN/GaN heterojunctions with (a) x = 0.1250, (b) x = 0.1875, (c) x = 0.2500 and (d) x = 0.3125.

The calculated Seebeck coefficient for AlxGa1-xN/GaN heterojunctions with (a) x = 0.1250, (b) x = 0.1875, (c) x = 0.2500 and (d) x = 0.3125.