The electrical characteristics of Al/p-InP Schottky contacts
In this study, it has been investigated the electrical characteristics of identically prepared Al/p-InP Schottky diodes. The barrier heights (BHs) and ideality factors of all devices have been calculated from the electrical characteristics. Although the diodes were all identically prepared, there was a diode-to-diode variation: the effective barrier heights ranged from 0.830.01 to 0.870.01eV, and the ideality factors ranged from 1.130.02 to 1.210.02. The barrier height vs. ideality factor plot has been plotted for the devices. Lateral homogeneous BH was calculated as a value of 0.86eV from the observed linear correlation between BH and ideality factor, which can be explained by laterally inhomogeneities of BHs. The values of barrier height and free carrier concentration yielded from the reverse bias capacitancevoltage (CV) measurements ranged from 0.860.04 to 1.000.04eV and from (3.470.39)1017 to (4.900.39)1017cm?3, respectively. The mean barrier height and mean acceptor doping concentration from CV characteristics have been calculated as 0.91eV and 3.991017cm?3, respectively.
ideality factor schottky barrier inp