Led Basic Concepts

LED basic concepts

Actually, light-emitting diode shorthand is LED. Different light-emitting diodes materials will launch different light color .

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For example,The light-emitting diodes is normally made of the gallium(Ga), arsenic(As), phosphorus(P) compounds,then GaAsP-light-emitting diode Show up the red light,then GaP-light-emitting diode Show up the green light,then SiC-light-emitting diode Show up  the yellow  light,Which of free electron recombine with the electron hole, it can radiate visible light, so according to this characteristic to make LED.

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Led crystals form a covalent bond, the outermost electrons of each atom is eight, constitute a stable structure.

Covalent bonds have a strong binding force, so that can be arranged atoms regularly, form crystals,the two electrons(in formation of the covalent) are bound tightly , known as valence electron or bound electron.After valence electrons to obtain a certain energy (temperature or by light), to break the shackles of the atomic nucleus,become free electrons (with negative charge),while leaving a space in the covalent bond ,called electron holes (positively charged).

 

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