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The Principle Of LED
- Jul 28, 2017 -

It is a kind of semiconductor diode

can convert electric energy into light energy. Light emitting diodes and ordinary diodes

LED chip development

LED chip development


Tube is composed of a PN junction

but also has a one-way conductivity. When the forward voltage is applied to the light-emitting diodes, the holes injected from the P region into the N region and the electrons injected from the N region into the P region are separated from the N-region electrons and the P-region Hole complex, resulting in spontaneous emission of fluorescence. The energy states of electrons and holes in different semiconductor materials are different. When the electrons and holes recombine when the release of energy is different, the more energy released, the shorter the wavelength of the emitted light. Commonly used is red, green or yellow diodes. The reverse breakdown voltage of the LED is greater than 5 volts.


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