Last week I completed my first self-supported, multi-stage, ultra-marathon “race” in Lapland, above the Arctic Circle. After more than 50 previous ultras, none of which have lasted more than a couple ...
The absolute internal quantum efficiency (IQE) of indium gallium nitride (InGaN) based blue light-emitting diodes (LEDs) at low temperatures is often assumed to be 100%. However, a new study has found ...