L. Stuchlíková, A. Kosa, J. Benkovska, P. Benko, L. Harmatha, J. Kováč
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Defects in schottky diodes based on AlGaN/GaN heterostructures
In this paper, the investigation of four types of Schottky-gate structures prepared by low-pressure metal-organic vapour phase epitaxy on sapphire and 4H-SiC substrates, by the deep level transient Fourier spectroscopy is presented. Fifteen deep energy levels have been identified (activation energies: 0.12, 0.26, 0.28, 0.48, 0.50, 0.69, 0.72, 0.75, 0.76, 1.02, 1.23, 1.28, 1.35, 1.57, 1.58 eV). The correlation between deep levels observed on different structure types is discussed.
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