Effect of Proton Radiation on Ultra-Wide Bandgap AlN Schottky Barrier Diodes

Jossue Montes, Tsung Han Yang, Houqiang Fu, Hong Chen, Xuanqi Huang, Kai Fu, Izak Baranowski, Yuji Zhao

Research output: Contribution to journalArticle

Abstract

Lateral Pd/n-AlN Schottky barrier diodes (SBDs) were fabricated and subjected to 3 MeV proton irradiation at various fluences. Electrical and material characterization analysis was performed before and after each radiation fluence to quantify the change in device characteristics. It was found that the SBDs performed reliably up to a proton irradiation fluence of 5×1013 cm-2, with little or no change in the key device performance such as current, turn-on voltage, ideality factor, and breakdown voltage, etc. The electrical characteristics of the SBDs was well predicted using a standard thermionic emission theory. The performance of the SBDs showed a significant degradation after a high-fluence irritation of 5×1015 cm-2, where the current of the SBDs dropped two orders of magnitude. Material and surface characterizations, including atomic force microscopy and X-ray diffraction, indicated a consistent degradation in the AlN bulk crystal quality and a drastic increase in surface roughness. These results provide valuable information on the radiation properties of AlN electronics and can serve as important references for the future development of high performance AlN devices for extreme environment applications.

Original languageEnglish (US)
JournalIEEE Transactions on Nuclear Science
DOIs
StateAccepted/In press - Jan 1 2018

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Keywords

  • Aluminum nitride
  • Aluminum nitride
  • barrier height
  • breakdown voltage
  • ideality factor
  • III-V semiconductor materials
  • leakage current
  • Performance evaluation
  • Protons
  • Radiation effects
  • radiation effects
  • Schottky barrier diodes
  • Schottky barriers
  • surface roughness
  • Temperature
  • turn on voltage

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

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