= Shuji Nakamura
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{wiki}
= S. Nakamura
{c}
{synonym}
<Shuji Nakamura> is an <electrical engineer> whose work helped make efficient blue <light-emitting diodes> possible using <gallium nitride> and <indium gallium nitride>. His work combined improved material growth, activation of <p-type semiconductor> and the design of an emitting active layer.<Background story of the invention of efficient blue InGaN light emitting diodes by Shuji Nakamura>[Sections III–V]{ref}
One crucial result concerned <hydrogen> binding to <magnesium> <acceptor impurities> in <gallium nitride>. The resulting complexes suppress their electrical activity; thermal treatment can remove that passivation. In an emitting <semiconductor heterostructure>, injected <electrons> and <holes> recombine in an active layer with a smaller <band gap> than the surrounding material, helping confine the carriers where light is produced. This connects material chemistry with an operating electronic device.<Background story of the invention of efficient blue InGaN light emitting diodes by Shuji Nakamura>[Introduction, figure 1; section III, Mg-H passivation]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Professor_Shuji_Nakamura_(Cropped)_(2).jpg?width=260]
{title=Portrait of <Shuji Nakamura>}
{description=Glenn Beltz. https://creativecommons.org/licenses/by/2.0/[CC BY 2.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Professor_Shuji_Nakamura_(Cropped)_(2).jpg}
{width=260}
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