energy-efficient Tag

Engineering researchers have created new high-power electronic devices that are more energy efficient than previous technologies. The devices are made possible by a unique technique for "doping" gallium nitride (GaN) in a controlled way. "Many technologies require power conversion -- where power is switched from one format to another," says Dolar Khachariya, the first author of a paper on the work and a former Ph.D. student at North Carolina State University. "For example, the technology might need to convert AC to DC, or convert electricity into work -- like an electric motor. And in any power conversion system, most power loss takes place at the power switch -- which is an active component of the electrical circuit that makes the power...