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Title: An AlN/Al0.85Ga0.15N high electron mobility transistor

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4959179· OSTI ID:1325715

An AlN barrier high electron mobility transistor (HEMT) based on the AlN/Al0.85Ga0.15N heterostructure was grown, fabricated, and electrically characterized, thereby extending the range of Al composition and bandgap for AlGaN channel HEMTs. An etch and regrowth procedure was implemented for source and drain contact formation. A breakdown voltage of 810 V was achieved without a gate insulator or field plate. Excellent gate leakage characteristics enabled a high Ion/Ioff current ratio greater than 107 and an excellent subthreshold slope of 75 mV/decade. A large Schottky barrier height of 1.74 eV contributed to these results. In conclusion, the room temperature voltage-dependent 3-terminal off-state drain current was adequately modeled with Frenkel-Poole emission.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1325715
Report Number(s):
SAND-2016-6904J; APPLAB; 645875
Journal Information:
Applied Physics Letters, Vol. 109, Issue 3; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 95 works
Citation information provided by
Web of Science

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Cited By (14)

Ultrawide-Bandgap Semiconductors: Research Opportunities and Challenges journal December 2017
Electronic Transport Properties in AlInGaN/AlGaN Heterostructures journal February 2018
High‐Temperature Operation of Al x Ga 1− x N ( x  > 0.4) Channel Metal Oxide Semiconductor Heterostructure Field Effect Transistors with High‐ k Atomic Layer Deposited Gate Oxides journal February 2020
Saturation Velocity Measurement of Al0.7Ga0.3N-Channel High Electron Mobility Transistors journal July 2019
The role of surface roughness on dislocation bending and stress evolution in low mobility AlGaN films during growth journal April 2018
AlGaN polarization-doped field effect transistor with compositionally graded channel from Al 0.6 Ga 0.4 N to AlN journal February 2019
Perspective: Ga 2 O 3 for ultra-high power rectifiers and MOSFETS journal December 2018
Enhancement-mode Al 0.85 Ga 0.15 N/Al 0.7 Ga 0.3 N high electron mobility transistor with fluorine treatment journal March 2019
Thermal conductivity of crystalline AlN and the influence of atomic-scale defects journal November 2019
Design of compositionally graded contact layers for MOCVD grown high Al-content AlGaN transistors journal July 2019
Ultra-wide bandgap AlGaN metal oxide semiconductor heterostructure field effect transistors with high- k ALD ZrO 2 dielectric journal October 2019
Temperature-Dependent Electrical Characteristics of β-Ga 2 O 3 Diodes with W Schottky Contacts up to 500°C journal December 2018
Planar Ohmic Contacts to Al 0.45 Ga 0.55 N/Al 0.3 Ga 0.7 N High Electron Mobility Transistors journal January 2017
Thermal Simulations of High Current β-Ga 2 O 3 Schottky Rectifiers journal January 2019