Scientists transformed existing optoelectronic devices into ones that can control electron spin at room temperature, without a ferromagnet or magnetic field. Researchers replaced the electrodes of ...

More than one-fifth of US electricity is used to power artificial lighting. Light-emitting diodes based on group III/nitride semiconductors are bringing about a revolution in energy-efficient lighting ...

High-brightness LEDs continue to make inroads into lighting applications that were traditionally dominated by incandescents and other light sources. Their use in traffic signals, automotive brake ...

The photograph shows a collection of about 15 colored phosphors. Colorful inorganic phosphors, such as the ones synthesized at Ludwig Maximilian University Munich shown here, work in concert with LEDs ...

Spurred by the increasing cost of energy and concerns about climate change, governments and industry are pushing for higher-efficiency lighting. HB LEDs (high-brightness light-emitting diodes) provide ...