But to create a white LED, red, blue and green light need to be combined. While the first two colors have been relatively easy to manufacture, researchers have struggled to produce a green LED.

Unfortunately, a blue LED photon with a peak emission wavelength of 450nm, has much more energy than, say, a green phosphor photon with a peak emission wavelength of 535nm. Energy lost due to this ...

As you probably know, we've had red and green light-emitting diodes (LEDs) for a long, long time -- but blue LEDs, for a variety of reasons, had evaded our scientists until fairly recently.

Deformable and high-resolution LEDs have attracted great interest for wearable electronics, but full-colour display is still challenging. Using a stamp printing technology, Choi et al. build ultra ...

By developing a blue LED to go with the red and green versions invented decades before, the 2014 laureates made it possible to create white-light LEDs – turning a niche technology into a ubiquitous ...