Carbide LED production quickly stopped when a different material, gallium nitride, showed 10–a hundred times brighter emission. This difference in efficiency is due to unfavorable indirect bandgap of SiC, whereas GaN contains a direct bandgap which favors light emission. Silicon is often a naturally occurring element found in many forms https://www.quora.com/profile/Trevor-Flatcher-2/Silicon-carbide-in-new-energy-generation-applications-and-future-trends-Silicon-Carbide-in-New-Energy-Generation-Applic