Photonics: Rainbow from a single LED

Photonics: Rainbow from a single LED

Nature 474, 7351 (2011). doi:10.1038/474254c

Inorganic light-emitting diodes (LEDs) are bright, stable and efficient, but usually emit only one colour. Gyu-Chul Yi at Seoul National University and his team have created LEDs that can be tuned continuously from red to blue (pictured) for potential use in the display