𝓦𝓪𝓽𝓬𝓱 "Why It Was Almost Impossible to Make the Blue LED (1970)" 𝓞𝓷𝓵𝓲𝓷𝓮 𝓼𝓽𝓻𝓮𝓪𝓶 𝓲𝓷 𝓗𝓓 𝓺𝓾𝓪𝓵𝓲𝓽𝔂.

The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.

Documentary

Derek Muller, Shuji Nakamura