The development of practical blue LEDs required great perseverance by several Japanese scientists who had to learn how to fabricate high-quality films of GaN and effectively dope them to create light-emitting p–n junctions.
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Nanishi, Y. The birth of the blue LED. Nature Photon 8, 884–886 (2014). https://doi.org/10.1038/nphoton.2014.291
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DOI: https://doi.org/10.1038/nphoton.2014.291
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