WHU team improves light extraction efficiency of AlGaN-based deep-ultraviolet LEDs via SiO2 insertion structure Researchers from Wuhan University in China have unveiled a new approach to boost the performance of AlGaN-based deep-ultraviolet light-emitting diode (DUV LED) by employing tailored quantum wells and SiO2 insertion structure. “We combine bandgap engineering with device craft to improve the radiative recombination efficiency and light extraction efficiency of the AlGaN-based DUV LED. Introducing the tailored quantum wells suppresses...

AlGaN-based DUV-LEDs are receiving much research attention due to their potential use in sterilization, water purification, phototherapy, and sunlight-independent high-speed optical communication. Scientists are investigating ways to improve their efficiency in converting electrical energy into optical energy. Deep UV LEDs made from AlGaN efficiently transfer electrical energy to optical energy due to the growth of one of its bottom layers in a step-like fashion. This finding, published in the journal Applied Physics Letters, can lead to the development of even more...

Earlier this week, UV LED specialist RayVio’s CEO Robert Walker spoke to LEDinside about the company’s outlook for the UVC LED sector, and their current market strategy.