Leakage current by Frenkel-Poole emission in Ni/Au Schottky contacts on Al0.83In0.17N/AlN/GaN heterostructures

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Abstract

In order to determine the reverse-bias leakage current mechanisms in Schottky diodes on Al0.83In0.17N/AlN/GaN heterostructures, the temperature-dependent current-voltage measurements were performed in the temperature range of 250-375 K. In this temperature range, the leakage current was found to be in agreement with the predicted characteristics, which is based on the Frenkel-Poole emission model. The analysis of the reverse current-voltage characteristics dictates that the main process in leakage current flow is the emission of electrons from a trapped state near the metal-semiconductor interface into a continuum of states which associated with each conductive dislocation.

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Applied Physics Letters

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AIP Publishing LLC

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Published Version (Please cite this version)

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English