What is it about?
• NiCo/β-Ga2O3 SBDs show Ron,sp ≈ 0.14 Ω·cm2 and BV ≈ 730 V • DLTS reveals deep donor-like traps affecting BV and leakage current • Devices exhibit ultra-low Jdark of 2.57 × 10-8 A/cm2 under X-rays • High sensitivity (0.8 μC/mGy·cm2 @ 0.1 mGys-1) with fast response of 0.3-0.5 s • Clear X-ray imaging achieved, with contrast limits in complex patterns
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Photo by Opt Lasers on Unsplash
Why is it important?
NiCo/Ga₂O₃ is important because NiCo (nickel–cobalt oxide or alloy) provides a tunable, thermally stable, high‑work‑function p‑type layer that solves several fundamental limitations of β‑Ga₂O₃, especially in junction engineering, contact formation, and electric‑field management. This makes it valuable for next‑generation high‑power, high‑voltage Ga₂O₃ devices.
Perspectives
NiCo/Ga₂O₃ is important because it enables: High‑voltage Ga₂O₃ power diodes 1) More efficient Ga₂O₃ MOSFETs 2) Better edge termination and breakdown control 3) High‑temperature, radiation‑hard electronics As Ga₂O₃ moves toward commercialization, NiCo‑based oxides and alloys will likely become key interface and termination materials.
Dr Geoffrey Tse
Southern University of Science and Technology
Read the Original
This page is a summary of: Ultrawide bandgap NiCo/β-Ga2O3 Schottky detectors for solar-blind UV response, low-dose X-ray detection, and X-ray imaging, Surfaces and Interfaces, May 2026, Elsevier,
DOI: 10.1016/j.surfin.2026.109657.
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