Study of the leakage current transport mechanisms in pseudo-vertical GaN-on-silicon Schottky diode grown by localized epitaxy - Laboratoire d'Electronique et des Technologies de l'Information
Journal Articles Crystals Year : 2024

Study of the leakage current transport mechanisms in pseudo-vertical GaN-on-silicon Schottky diode grown by localized epitaxy

Abstract

In this work, a GaN-on-Si quasi-vertical Schottky diode was demonstrated by growing locally the n-GaN drift layer. The diode achieves a high current density of 2.5 kA/cm², a specific on-resistance RON,sp of 1.9 mΩ.cm² despite the crowding effect in quasi-vertical device and on/off current ratio (Ion/Ioff) of 1010. Temperature-dependent cur-rent-voltage characteristics have been measured in the range of 300-433 K to investigate the mechanisms of leakage conduction. At near zero bias, thermionic emission was found to dominate. At voltage range from -1 to -10 V, electrons gain enough energy to excite into trap states, leading to the dominance of Frenkel-Poole emission (FPE). For a relatively higher voltage range (-10V to -40V), the increased electric field promotes electrons hop-ping along the threading dislocations in the “bulk” GaN layers, and thus, Variable Range Hopping becomes the main mechanism for the whole temperature range. This work pro-vides an in-depth insight into the leakage conduction mechanism on vertical GaN-on-Si SBDs grown by localised epitaxy, and also provides a useful design guide for the edge termination of vertical power devices.
Fichier principal
Vignette du fichier
V3.pdf (1.5 Mo) Télécharger le fichier
Origin Publication funded by an institution
licence

Dates and versions

cea-04724988 , version 1 (07-10-2024)

Licence

Identifiers

Cite

Mohammed El Amrani, Julien Buckley, Thomas Kaltsounis, David Plaza Arguello, Hala El Rammouz, et al.. Study of the leakage current transport mechanisms in pseudo-vertical GaN-on-silicon Schottky diode grown by localized epitaxy. Crystals, 2024, 14, pp.553. ⟨10.3390/cryst14060553⟩. ⟨cea-04724988⟩
0 View
0 Download

Altmetric

Share

More