Carbide LED production before long stopped when a different material, gallium nitride, showed 10–a hundred times brighter emission. This difference in efficiency is a result of the unfavorable indirect bandgap of SiC, whereas GaN features a direct bandgap which favors light emission. “The concern is, ‘what’s occurring in China?�?China is https://www.facebook.com/permalink.php?story_fbid=pfbid0tgzbP3xvRNr7vz9ugJqxZ6qpW5rJYkaQNiedGwxis84bSqzVZmu65mEhkn4EEZaRl&id=61562415773754&__cft__[0]=AZUrPa6046vl1x5Ftd0n16emkDMeojSzj35m7-jdmqDLTpbX-jZAVM_uwJUldY-XHZ04cAZ6vkYT8gm1B3edr4TeP-Apugz1_-4oH5k3it3N097r57Ozvke5N3NZ60v_2AyVWmIqx2dFIvr0wOUjIISc44eGuRP-V0ExBtxAs2yhT7Ru9DNLZcRk2HWmDM0LShzlX5f-MGd7fLEthGwT_Rxd&__tn__=%2CO%2CP-R