make magazine: the led

If you can get past the freaky intro, this video contains some nice information about the history of LEDs and a very cool lab experiment demonstrating how a raw silicon carbide crystal glows in different regions when electrified. Silicon carbide is now commonly used as a substrate for many blue/phosphor “white” LEDs.

 

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About Brad Koerner

Venture Manager - Luminous Patterns Philips Lighting
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