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Isamu Akasaki

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Isamu Akasaki
Isamu Akasaki
Born(1929-01-30)January 30, 1929
Chiran, Kawanabe District, Kagoshima, Empire of Japan
DiedApril 1, 2021(2021-04-01) (aged 92)
Nagoya, Aichi, Japan
FieldsPhysics, Engineering
InstitutionsMeijo University
Nagoya University
Alma materKyoto University
Nagoya University
Notable awardsAsahi Prize (2001)
Takeda Award (2002)
Kyoto Prize (2009)
IEEE Edison Medal (2011)
Nobel Prize in Physics (2014)
Charles Stark Draper Prize (2015)
This person won a Nobel Prize

Isamu Akasaki (赤崎 勇 Akasaki Isamu?, January 30, 1929 – April 1, 2021) was a Japanese engineer and physicist. He was best known for inventing the bright gallium nitride (GaN) p-n junction blue LED in 1989.[1][2][3][4]

Akasaki was awarded the Kyoto Prize in Advanced Technology in 2009.[5] He was also awarded the 2014 Nobel prize in Physics with Hiroshi Amano and Shuji Nakamura[6] "for the invention of efficient blue light-emitting diodes, which has enabled bright and energy-saving white light sources".

Akasaki died on April 1, 2021 at his home in Nagoya, Japan from pneumonia, aged 92.[7]


  1. "Japanese Journal of Applied Physics". 
  2. "Japanese Journal of Applied Physics". 
  3. Amano, Hiroshi; Kito, Masahiro; Hiramatsu, Kazumasa; Akasaki, Isamu (1989-12-20). "P-Type Conduction in Mg-Doped GaN Treated with Low-Energy Electron Beam Irradiation (LEEBI)". Japanese Journal of Applied Physics (Japan Society of Applied Physics) 28 (Part 2, No. 12): L2112–L2114. doi:10.1143/jjap.28.l2112 . ISSN 0021-4922 . 
  4. Isamu Akasaki; Hiroshi Amano; Masahiro Kito; Kazumasa Hiramatsu (1991). "Photoluminescence of Mg-doped p-type GaN and electroluminescence of GaN p-n junction LED". Journal of Luminescence (Elsevier BV) 48-49: 666–670. doi:10.1016/0022-2313(91)90215-h . ISSN 0022-2313 . 
  6. "The 2014 Nobel Prize in Physics - Press Release". Nobel Media AB 2014. 
  7. "Nobel-Winning Scientist Isamu Akasaki Dies at 92". April 2, 2021.