Publications by Alessandro Floriduz

p-NiO/LiNiO-GaN heterojunctions: a potential alternative to p-GaN for advanced devices

Mounir Driss Mensi, Elison de Nazareth Matioli, Alessandro Floriduz, Zheng Hao

In this work, we introduce a p-NiO/LiNiO stack grown via low-temperature deposition processes, offering an effective alternative for creating localized p-type regions in GaN devices. This stack combines a high hole concentration p-NiO film ([h] = 2 × 1019 ...

Institute of Electrical and Electronics Engineers2025

Direct high-temperature MOCVD growth of GaN on foreign substrates

Alessandro Floriduz

GaN-based devices are ubiquitous in everyday life, ranging from InGaN/GaN light-emitting diodes (LEDs) for illumination to AlGaN/GaN high-electron-mobility transistors for compact power supplies. Nevertheless, despite the tremendous development in the past ...

EPFL2024

Polarization-enhanced GaN Schottky barrier diodes: Ultra-thin InGaN for high breakdown voltage and low Ron

Elison de Nazareth Matioli, Alessandro Floriduz, Zheng Hao

In this work, we present a concept that leverages the strong piezoelectric polarization field in InGaN, which counteracts the external electric field at reverse bias. We show that despite the smaller InGaN band-gap and lower critical electric field, its st ...

2024

Direct high-temperature growth of GaN on Si using trimethylaluminum preflow enabling vertically-conducting heterostructures

Elison de Nazareth Matioli, Alessandro Floriduz

In this work, we demonstrate that GaN can be directly grown at high temperature on Si(111) substrates by metalorganic CVD without using any intentional AlN buffer, by simply employing a trimethylaluminum (TMAl) preflow. We found that n-GaN layers directly ...

Iop Publishing Ltd2024

Direct high-temperature growth of single-crystalline GaN on ScAlMgO4 substrates by metalorganic chemical vapor deposition

Elison de Nazareth Matioli, Alessandro Floriduz

In this note, we demonstrate direct high-temperature growth of single-crystalline GaN on c-plane ScAlMgO4 substrates by metalorganic chemical vapor deposition, without using low-temperature buffers. We found that a trimethylaluminium preflow was crucial to ...

IOP Publishing Ltd2022

GaN growth on ScAlMgO4 substrates via thermally-dewetted thin Al films

Elison de Nazareth Matioli, Alessandro Floriduz

In this note, we demonstrate the high-temperature growth of GaN on ScAlMgO4 substrates by metalorganic vapor phase epitaxy when a thin Al film is deposited ex situ on the ScAlMgO4 surface, prior to GaN growth. Mirror-like high-quality GaN epitaxial layers ...

IOP Publishing Ltd2022

Seed Dibbling Method for the Grow of High-Quality Diamond on GaN

Elison de Nazareth Matioli, Riyaz Mohammed Abdul Khadar, Reza Soleiman Zadeh Ardebili, Remco Franciscus Peter van Erp, Mehdi Naamoun, Alessandro Floriduz

The integration of diamond and GaN has been highly pursued for thermal management purposes as well as combining their exceptional complementary properties for power electronics applications and novel semiconductor heterostructures. However, the growth of d ...

AMER CHEMICAL SOC2021

p-NiO junction termination extensions for GaN power devices

Elison de Nazareth Matioli, Riyaz Mohammed Abdul Khadar, Taifang Wang, Alessandro Floriduz

We report the demonstration of p-NiO layers as junction termination extensions (JTEs) for realizing high-performance GaN power devices. The p-NiO was deposited by RF sputtering, a flexible process which enables to achieve high hole densities. In this work, ...

IOP PUBLISHING LTD2021

Quasi-vertical GaN-on-Si reverse blocking power MOSFETs

Elison de Nazareth Matioli, Riyaz Mohammed Abdul Khadar, Reza Soleiman Zadeh Ardebili, Chao Liu, Alessandro Floriduz

We demonstrate quasi-vertical reverse blocking (RB) MOSFETs on 6.7 mu m thick GaN grown on a 6 inch Si substrate by metalorganic chemical vapor deposition. The RB capability was achieved by replacing the ohmic drain with a quasi-vertical Schottky drain, re ...

IOP PUBLISHING LTD2021

p-NiO Junction Termination Extensions for High Voltage Vertical GaN Devices

Elison de Nazareth Matioli, Riyaz Mohammed Abdul Khadar, Pirouz Sohi, Reza Soleiman Zadeh Ardebili, Taifang Wang, Catherine Erine, Remco Franciscus Peter van Erp, Luca Nela, Alessandro Floriduz

In this paper, we illustrate the use of RF-sputtered p-NiO to fabricate Junction Termination Extensions (JTEs) for high-performance vertical GaN-on-Si Schottky Barrier Diodes (SBDs). The GaN epitaxial structures were grown on 6-inch Si wafers by MOCVD. The ...

IEEE2021

Approximate Kron Reduction Methods for Electrical Networks With Applications to Plug-and-Play Control of AC Islanded Microgrids

Giancarlo Ferrari Trecate, Michele Tucci, Alessandro Floriduz

Kron reduction (KR) is a methodology for analyzing an electrical network by replacing it with a simpler circuit having less nodes but the same terminal behavior of voltages and currents at target vertices. Existing approaches to instantaneous KR, however, ...

2019