Piezoelectric charge densities in AlGaN/GaN HFETs

P. M. Asbeck, E. T. Yu, S. S. Lau, G. J. Sullivan, J. Van Hove, J. Redwing

Research output: Contribution to journalArticle

251 Scopus citations


New estimates of the piezoelectric charge density at (0001) AlGaN/GaN interfaces are provided. Undoped HFET structures grown by both MBE and MOCVD, on sapphire and SiC substrates, exhibit electron densities of ∼5 × 1013 cm-2·χAl (where χAl is the aluminium mol fraction in the AlGaN), which can be attributed to piezoelectric effects. These have a significant influence on the design and behaviour of III-V nitride HFETs.

Original languageEnglish (US)
Pages (from-to)1230-1231
Number of pages2
JournalElectronics Letters
Issue number14
StatePublished - Jul 3 1997


All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Asbeck, P. M., Yu, E. T., Lau, S. S., Sullivan, G. J., Van Hove, J., & Redwing, J. (1997). Piezoelectric charge densities in AlGaN/GaN HFETs. Electronics Letters, 33(14), 1230-1231. https://doi.org/10.1049/el:19970843