Ultrawide-Bandgap Semiconductors: Research Opportunities and Challenges

J. Y. Tsao, S. Chowdhury, M. A. Hollis, D. Jena, N. M. Johnson, K. A. Jones, R. J. Kaplar, S. Rajan, C. G. Van de Walle, E. Bellotti, C. L. Chua, R. Collazo, M. E. Coltrin, J. A. Cooper, K. R. Evans, S. Graham, T. A. Grotjohn, E. R. Heller, M. Higashiwaki, M. S. IslamP. W. Juodawlkis, M. A. Khan, A. D. Koehler, J. H. Leach, U. K. Mishra, Robert Nemanich, R. C.N. Pilawa-Podgurski, J. B. Shealy, Z. Sitar, M. J. Tadjer, A. F. Witulski, M. Wraback, J. A. Simmons

Research output: Contribution to journalReview article

165 Scopus citations


Ultrawide-bandgap (UWBG) semiconductors, with bandgaps significantly wider than the 3.4 eV of GaN, represent an exciting and challenging new area of research in semiconductor materials, physics, devices, and applications. Because many figures-of-merit for device performance scale nonlinearly with bandgap, these semiconductors have long been known to have compelling potential advantages over their narrower-bandgap cousins in high-power and RF electronics, as well as in deep-UV optoelectronics, quantum information, and extreme-environment applications. Only recently, however, have the UWBG semiconductor materials, such as high Al-content AlGaN, diamond and Ga2O3, advanced in maturity to the point where realizing some of their tantalizing advantages is a relatively near-term possibility. In this article, the materials, physics, device and application research opportunities and challenges for advancing their state of the art are surveyed.

Original languageEnglish (US)
Article number1600501
JournalAdvanced Electronic Materials
Issue number1
StatePublished - Jan 1 2018



  • aluminum nitride
  • boron nitride
  • diamond
  • extreme environments
  • gallium oxide
  • power electronics
  • ultrawide bandgaps
  • UV-C

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Tsao, J. Y., Chowdhury, S., Hollis, M. A., Jena, D., Johnson, N. M., Jones, K. A., Kaplar, R. J., Rajan, S., Van de Walle, C. G., Bellotti, E., Chua, C. L., Collazo, R., Coltrin, M. E., Cooper, J. A., Evans, K. R., Graham, S., Grotjohn, T. A., Heller, E. R., Higashiwaki, M., ... Simmons, J. A. (2018). Ultrawide-Bandgap Semiconductors: Research Opportunities and Challenges. Advanced Electronic Materials, 4(1), [1600501]. https://doi.org/10.1002/aelm.201600501