As it has been released, this year’s nobel price for physics has been awarded to Isamu Akasaki, Hirosho Amano and Shuji Nakamura from Japan. The scientists have been awarded for the development of highly efficienct blue LEDs, the so-called “Quantum-Dot-LEDs”.
 
As commonly know, white LED can be generated in basically two ways. Firstly through RGB, meaning a mixture of semiconductor-chips with different colour results in white light. RGBs enable the creation of all kinds of colours, but it is not possible to achieve a decent colour rendering index (RGB) without the add-on of white LEDs.
   
The second way of creating white LED light is the application of luminescence layer onto the blue LEDs, warm white is typically being packaged with an thicker orange phosphor layer, neutral white with a yellow thinner phosphor layer and cold white with blue-purple phosphor layer of middle-range thickness.
 
Quantum-Dot-LEDs are able to generate white light in a much more efficient way. The Quantum-LED’s luminescence layer consists as the name suggests of Quantum-Dots and can convert blue LED light efficiently into white light with a high colour rendering index (CRI) whilst not loosing luminous flux as it is the case with the currently available luminescence layer material on the market.