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N-polar GaN/AlGaN/AlN high electron mobility transistors on single-crystal bulk AlN substrates
- Source :
- Applied Physics Letters. 122:092104
- Publication Year :
- 2023
- Publisher :
- AIP Publishing, 2023.
-
Abstract
- Recent observation of high density polarization-induced two-dimensional electron gases in ultra-thin N-polar GaN layers grown on single-crystal AlN has enabled the development of N-polar high electron mobility transistors (HEMTs) on AlN. Such devices will take advantage of thermal and power handling capabilities of AlN, while simultaneously benefitting from the merits of N-polar structures, such as a strong back barrier. We report the experimental demonstration of N-polar GaN/AlGaN/AlN HEMTs on single-crystal AlN substrates, showing an on-current of 2.6 A/mm with a peak transconductance of 0.31 S/mm. Small-signal RF measurements revealed speeds exceeding ft/ fmax = 68/100 GHz. These results pave the way for developing RF electronics with excellent thermal management based on N-polar single-crystal AlN.
- Subjects :
- Physics and Astronomy (miscellaneous)
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 122
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........295ebe489430e19beac9a89719edee2c