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Electronics 2016, 5(2), 20;

Trapping Analysis of AlGaN/GaN Schottky Diodes via Current Transient Spectroscopy

Institute of Electronics and Photonics, Slovak University of Technology, SK-81219 Bratislava, Slovakia
Author to whom correspondence should be addressed.
Academic Editor: Farid Medjdoub
Received: 18 March 2016 / Revised: 4 May 2016 / Accepted: 5 May 2016 / Published: 10 May 2016
(This article belongs to the Special Issue Gallium Nitride Electronics)
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Trapping effects on two AlGaN/GaN Schottky diodes with a different composition of the AlGaN barrier layer were analyzed by current transient spectroscopy. The current transients were measured at a constant bias and at six different temperatures between 25 and 150 °C. Obtained data were fitted by only three superimposed exponentials, and good agreement between the experimental and fitted data was achieved. The activation energy of dominant traps in the investigated structures was found to be within 0.77–0.83 eV. This nearly identical activation energy was obtained from current transients measured at a reverse bias of −6 V as well as at a forward bias of+1 V. It indicates that the dominant traps might be attributed to defects mainly associated with dislocations connected predominantly with the GaN buffer near the AlGaN/GaN interface. View Full-Text
Keywords: AlGaN/GaN; Schottky diode; exponential function; (de)trapping; activation energy AlGaN/GaN; Schottky diode; exponential function; (de)trapping; activation energy

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Florovič, M.; Škriniarová, J.; Kováč, J.; Kordoš, P. Trapping Analysis of AlGaN/GaN Schottky Diodes via Current Transient Spectroscopy. Electronics 2016, 5, 20.

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