08 October 2014

Blue LED Scientists Receive The 2014 Nobel Prize in Physics

Without the invention of the Blue LED in the mid-1990s, we might not have the bright white LED lights today. 

In the 1990s, three Japanese scientists, Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura discovered that gallium nitride (GaN) was capable of creating efficient, bright blue LEDs. And this year, these inventors were awarded in this year's Nobel Prize in Physics.
The invention of the BLUE LED gives the scientists to recognize and receive Nobel Prize in Physics.
“for the invention of efficient blue light-emitting diodes which has enabled bright and energy-saving white light sources”
Creation of bright blue light beams from their semiconductors in the early 1990s was the fundamental step to create bright white LED light to potentially provide light to 1.5 billion of people.

White LED lamps to emit a bright white light, are long-lasting and energy-efficient. As about one fourth of world electricity consumption is used for lighting purposes, the LEDs contribute to saving the Earth’s resources.

What is LED
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a basic pn-junction diode, which emits light when activated. When a fitting voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor. ~ wikipedia
On October 7, 2014, the Nobel Prize in Physics was awarded to three Japanese Scientists namely: Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura for the invention of efficient blue led will share the 8 million Swedish krona prize (~$1.1 million).

Blue LED. Image ExtremeTech
About the Scientists

Isamu Akasaki,, Japanese citizen. Born 1929 in Chiran, Japan. Ph.D. 1964 from Nagoya University, Japan. Professor at Meijo University, Nagoya, and Distinguished Professor at Nagoya University, Japan.
Hiroshi Amano,, Japanese citizen. Born 1960 in Hamamatsu, Japan. Ph.D. 1989 from Nagoya University, Japan. Professor at Nagoya University, Japan.
Shuji Nakamura, American citizen. Born 1954 in Ikata, Japan. Ph.D. 1994 from University of Tokushima, Japan. Professor at University of California, Santa Barbara, CA, USA.

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