What does this research mean for the field?

Interface-related defects at the AlGaN/GaN heterointerface, specifically a dominant trap level at 0.28 eV, act as intermediate states that enhance trap-assisted tunneling and non-radiative recombination, directly contributing to leakage current and Schottky barrier inhomogeneity in AlGaN/GaN/Si HEMTs. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine the role of interface defects in carrier transport and recombination mechanisms within AlGaN/GaN/Si high electron mobility transistors.

September 5, 2026The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics

Electrical and optical characterisation in AlGaN/GaN/Si HEMTs

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Authors

HMHana Mosbahi AEAkrem Essaoudi MGMalek Gassoumi

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Overview

Experimental characterization demonstrates defect-driven leakage and recombination in AlGaN/GaN/Si HEMTs, highlighting interface trap states as key performance limiters.

Key Points

To determine the role of interface defects in carrier transport and recombination mechanisms within AlGaN/GaN/Si high electron mobility transistors.
Fabricated AlGaN/GaN/Si high electron mobility transistors using molecular beam epitaxy.
Characterized electrical and optical properties using temperature-dependent current-voltage measurements, deep-level transient spectroscopy, and photoluminescence.
Identified a dominant interface trap level (H1) located at 0.28 eV with a capture cross section of 2.32 × 10⁻¹⁶ cm² and a concentration of 2.8 × 10¹⁵ cm⁻³.
Observed Schottky barrier inhomogeneity and defect-assisted tunneling under reverse bias, directly contributing to device leakage current.
Detected temperature-dependent photoluminescence quenching and linewidth broadening attributable to non-radiative recombination at interface defect states.

Cite This Study

Mosbahi et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd4536b95aff0620ebe8b https://doi.org/10.1080/14786435.2026.2726232

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September 5, 2026The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics

Electrical and optical characterisation in AlGaN/GaN/Si HEMTs

View Full Paper

Ask AI

Bookmark

Authors

HMHana Mosbahi AEAkrem Essaoudi MGMalek Gassoumi

Discussion

Member takes

Overview

Experimental characterization demonstrates defect-driven leakage and recombination in AlGaN/GaN/Si HEMTs, highlighting interface trap states as key performance limiters.

Key Points

To determine the role of interface defects in carrier transport and recombination mechanisms within AlGaN/GaN/Si high electron mobility transistors.
Fabricated AlGaN/GaN/Si high electron mobility transistors using molecular beam epitaxy.
Characterized electrical and optical properties using temperature-dependent current-voltage measurements, deep-level transient spectroscopy, and photoluminescence.
Identified a dominant interface trap level (H1) located at 0.28 eV with a capture cross section of 2.32 × 10⁻¹⁶ cm² and a concentration of 2.8 × 10¹⁵ cm⁻³.
Observed Schottky barrier inhomogeneity and defect-assisted tunneling under reverse bias, directly contributing to device leakage current.
Detected temperature-dependent photoluminescence quenching and linewidth broadening attributable to non-radiative recombination at interface defect states.

Cite This Study

Mosbahi et al. (2026) studied this question.

synapsesocial.com/papers/6a9bd4536b95aff0620ebe8b https://doi.org/10.1080/14786435.2026.2726232

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