I just found an interesting 2011 article from MIT’s Technology Review :  A startup called Transphorm is using GaN power electronics to substantially reduce power converter sizes. The possibility of using gallium nitride in power electronics has been known for decades, but producing high-quality versions of the material has been a challenge. That problem, however, was largely solved by researchers who figured out how to use gallium nitride in LEDs, Mishra says. Transphorm has optimized the material for power electronics, and it has developed novel devices (such as transistors), circuits, and complete modules that include all the components needed to … Continue reading transphorm – GaN power electronics