With improved doping of your semiconductor, the width from the depletion region drops. Underneath a particular width, the charge carriers can tunnel with the depletion area. At quite significant doping ranges, the junction will not behave for a rectifier anymore and gets to be an ohmic Get in touch with. https://silicon-carbide-diodes20730.blogscribble.com/13660661/the-greatest-guide-to-sic-schottky-barrier-diodes