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Light-emitting diode

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Light-emitting diode

Description

A light-emitting diode (LED) is a light source (semiconductor), used in many every-day applications and specifically in fluorometry. LEDs are available for specific spectral ranges across wavelengths in the visible, ultraviolet, and infrared range.

Abbreviation: LED



MitoPedia methods: Fluorometry, Spectrophotometry 


MitoPedia O2k and high-resolution respirometry: O2k hardware 



'Todayโ€™s LEDs, which come in several colors, evolved from Holonyakโ€™s seminal work in 1962. At a time when other researchers focused on infrared light, Holonyak invented a method to synthesize gallium arsenide phosphide (GaAsP) crystals, which exhibited wavelengths in the visible spectrum. Using this "tunable" alloy, Holonyak crafted the first practical LED in 1962 (the red LED). โ€œI wanted to work in the visible spectrum where the human eye sees, and everybody else was working in the infrared,โ€ remarked Holonyak.' - "Nick Holonyak, Jr. 2004 Lemelson-MIT Prize Winner". Lemenson-MIT Program. Retrieved 2012-02-29