In 2014, Nobel Prize winners were awarded for having invented a new energy-efficient and environmentally friendly source of light – blue light-emitting diode (LED). In the spirit of Alfred Nobel prizes reward the inventions, which has brought the greatest benefit to mankind. Due to the use of blue light-emitting diodes, white light can be created in a new way. We have a longer-term and more effective alternative to the old light sources with the appearance of LED lamps.
When Isamu Akasaki, Shuji Nakamura and Hiroshi Amano created their bright blue beams of light with a semiconductor in the early 1990s, they have caused a radical transformation of lighting equipment. Red and green LEDs have existed for a long time, but without the blue light, white lamp could not be created. Despite considerable efforts, both in the scientific community and industry, the blue LED remains a task for three decades.
In particular, when the electric bulb illuminates the most of the energy is converted into heat and only a small part into the light. But in the LEDs, electricity is directly converted into the light.
LED lighting has a great potential to improve the quality of life for more than 1.5 billion people worldwide which have no access to electricity networks. It has been proven that the LEDs lightings twenty times more efficient than incandescent bulbs and four times more efficient than fluorescent lamps.
This invention is only 20 years old, but it has contributed to the creation of white light in a totally new manner for the benefit of everybody.
The Nobel Committee declaring the winner, said that “Incandescent lamps lit 20th century, the 21st century will be lit by LED lamps.”