Conductor to the cathode, or P type semiconductor type n only one direction only. Can divide kinds of semiconductor diode model, as follows:
1. Light-emitting diodes (LED: light-emitting diode)
.LED is a semiconductor device, one is in the category of diodes that can emit light in a spectrum range is narrow. When electrical bias in the forward direction. This phenomenon is in the form of electroluminescence.And the glow near the ultraviolet, the visible light and infrared range, when the P ไฟบวก negative light side and N electrons and holes will flow together. The electrons will release energy in the form of electromagnetic waves.Can see the light emitted from the diode of this type. Semiconductor used as the main ingredient, is a substance you lick (Ga crystal) with various colors, such as red,Green, orange, arise from a substance put on the crystal additives into you lick
2. Photodiode (Photo Diode)
.A photodiode is a diode that relies on light from the outside through the blades. The embedded joint p-n to encourage diodes work. The photodiode for use as a reverse bias. Because want a photodiode to work immediately.
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