ISAMU Akasaki and Hiroshi Amano of Japan and US scientist Shuji Nakamura won the Nobel Prize in physics yesterday for the invention of blue light-emitting diodes, a breakthrough that spurred the development of LED technology used to light up computer screens and modern smartphones.
The Royal Swedish Academy of Sciences says their invention is just 20 years old, "but it has already contributed to create white light in an entirely new manner to the benefit of us all."
Scientists had struggled for decades to produce blue diodes that are a crucial component in producing white light from LEDs when the three laureates made their breakthroughs in the early 1990s.
Their work transformed lighting technology, paving the way for LED lights that are more long-lasting and energy-efficient than older sources of light.
"They succeeded where everyone else had failed," the Nobel committee said. "Incandescent light bulbs lit the 20th century; the 21st century will be lit by LED lamps."
Akasaki, 85, is a professor at Meijo University and distinguished professor at Nagoya University. Amano, 54, is also a professor at Nagoya University, while 60-year-old Nakamura is a Japanese-born professor at the University of California, Santa Barbara.
Akasaki said he had often been told that his research wouldn’t bear fruit within the 20th century. "But I never felt that way," he said. "I was just doing what I wanted to do."
Akasaki and Amano made their inventions while working at Nagoya University while Nakamura was working separately at Japanese company Nichia Chemicals. They built their own equipment and carried out thousands of experiments — many of which failed — before they made their breakthroughs.
In a statement from his university, Nakamura said he was honored to receive the prize.
"It is very satisfying to see that my dream of LED lighting has become a reality," he said. "I hope that energy-efficient LED light bulbs will help reduce energy use and lower the cost of lighting worldwide."
The Nobel committee said LEDs contribute to saving the Earth’s resources because about one-fourth of world electricity consumption is for lighting.
They are more efficient than older light sources and tend to last 10 times longer than fluorescent lamps and 100 times longer than incandescent light bulbs.
"The blue LED is a fundamental invention that is rapidly changing the way we bring light to every corner of the home, the street and the workplace — a practical invention that comes from a fundamental understanding of physics in the solid state," said H. Frederick Dylla, the executive director and CEO of the American Institute of Physics.
On Monday, US-British scientist John O’Keefe split the Nobel Prize in medicine with Norwegian couple May-Britt Moser and Edvard Moser for breakthroughs in brain cell research that could pave the way for a better understanding of diseases like Alzheimer’s.
The Nobel award in chemistry will be announced today, followed by the literature award tomorrow, the Nobel Peace Prize on Friday and the economics prize next Monday.
Worth 8 million kronor (US$1.1 million) each, Nobel Prizes are handed out on December 10, the anniversary of founder Alfred Nobel’s death in 1896.
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