What is special about a blue LED?

What is special about a blue LED?

LEDs have a longer lifespan, emit less heat, and use less electricity than both incandescent and compact fluorescent light sources. The invention of blue LEDs meant that blue, red, and green could all be combined to produce white LED light, which can function as an alternative energy-saving light source.

What is the significant impact of the invention of high brightness blue LED by Shuji Nakamura in early 1990s?

Professors Isamu Akasaki, Hiroshi Amano and Shuji Nakamura made the first blue LEDs in the early 1990s. This enabled a new generation of bright, energy-efficient white lamps, as well as colour LED screens. The winners will share prize money of eight million kronor (£0.7m).

Who invented white LED?

His invention illuminates the world: Prof. Dr. Jürgen Schneider, former head of department at Fraunhofer Institute for Applied Solid State Physics and inventor of the white LED, celebrates his 80th birthday at 25.11. 2011.

What is Shuji Nakamura famous for?

blue light-emitting diodes
Shuji Nakamura, (born May 22, 1954, Ehime, Japan), Japanese-born American materials scientist who was awarded the 2014 Nobel Prize in Physics for inventing blue light-emitting diodes (LEDs). He shared the prize with Japanese materials scientists Akasaki Isamu and Amano Hiroshi.

Why are blue LEDs so bright?

A green LED with a 1 kOhm resistor is very dim at 5 V, whereas a blue LED with the same resistor is incredibly bright. The forward voltage of the blue LED is ~50% higher, so the extra brightness is not because of increased current.

When was blue LED light invented?

Akasaki, when he was a professor at Nagoya University, worked with Amano to produce gallium nitride crystals, and succeeded in 1989 in creating the world’s first blue LED.

Why was the blue LED so hard to make?

The key ingredient for blue LEDs is gallium nitride, a robust material with a large energy separation or “gap” between electrons and holes. This gap is crucial in tuning the energy of the emitted photons to produce blue light.

Why blue LED is considered a huge invention?

It was a huge technical achievement because the necessary properties for making blue light could not be achieved with a semiconductor similar to those already being used for LEDs. The invention of the first bright blue LED enabled the use of LEDs to make white light.

Why did Isamu Akasaki win a Nobel Prize?

In 2014 Akasaki, along with Amano and Nakamura, were awarded the Nobel Prize for Physics for “the invention of efficient blue light-emitting diodes which has enabled bright and energy-saving white light sources”.

What kind of LEDs does Shuji Nakamura use?

Nakamura has also worked on green LEDs, and is responsible for creating the white LED and blue laser diodes used in Blu-ray Discs and HD DVDs. Nakamura is a professor of Materials at the University of California, Santa Barbara.

When did Shuji Nakamura make the blue diode?

Victory finally came in the early ‘90s when Nakamura put all the remaining pieces together, and the blue light-emitting diode was born. Shuji Nakamura, a man once seen as an under-dog in his field, brought new meaning to the way we live our lives.

What did Shuji Nakamura win a Nobel Prize for?

Together with Isamu Akasaki and Hiroshi Amano, he is one of the three recipients of the 2014 Nobel Prize for Physics “for the invention of efficient blue light-emitting diodes, which has enabled bright and energy-saving white light sources”.

When did Shuji Nakamura leave Nichia Corporation?

Nakamura continued to develop the blue LED on his own and in 1993 succeeded in making the device. He was awarded a D.Eng. degree from the University of Tokushima in 1994. He left Nichia Corporation in 1999 and took a position as a professor of engineering at the University of California, Santa Barbara.