Opportunities and Future Directions for Ga2O3

Abstract

The beta-polytype of Ga2O3 has a bandgap of similar to 4.8 eV, can be grown in bulk form from melt sources, has a high breakdown field of similar to 8MV. cm(-1) and is promising for power electronics and solar blind UV detectors, as well as extreme environment electronics (high temperature, high radiation, and high voltage (low power) switching. High quality bulk Ga2O3 is now commercially available from several sources and n-type epi structures are also coming onto the market. There are also significant efforts worldwide to grow more complex epi structures, including beta-(AlxGa(1x)) O-2(3)/Ga2O3 and beta-(InxGa(1-x))(2)O-3/Ga2O3 heterostructures, and thus this materials system is poised to make rapid advances in devices. To fully exploit these advantages, advances in bulk and epitaxial crystal growth, device design and processing are needed. This article provides some perspectives on these needs. (C) The Author(s) 2017. Published by ECS. All rights reserved.