Light Emitting Diodes

Authored by: Jaehee Cho , E. Fred Schubert

Encyclopedia of Optical and Photonic Engineering

Print publication date:  September  2015
Online publication date:  September  2015

Print ISBN: 9781439850978
eBook ISBN: 9781351247184
Adobe ISBN:

10.1081/E-EOE2-120047141

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Abstract

The field of photonics starts with the generation of light. The efficient generation of highly controllable light can indeed be accomplished with light-emitting diodes (LEDs), which are, in principle, capable of generating any single-colored light as well as white light; the latter with a 20 times greater efficiency than conventional lightbulbs. Today, the infrared, entire visible, and ultraviolet spectrum regions can be covered by light-emitting semiconductors, mainly AlGaInP and AlGaInN compound semiconductors. In this entry, fundamental research in LEDs will be presented and reviewed to give a short summary of the development of solid-state LEDs during the last few decades.

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