Diodes are made from two differently doped layers of semiconductor material that form a PN junction. The P-type material has a surplus of positive charge carriers (holes) and the N type, a surplus of electrons. The severity of the voltage drop is a function of the semiconductor material that the diode is made from.
Regarding this, how does diode act as a rectifier?
In an electronic circuit a diode acts in the same as a rubber valve in a bicycle tire. The valve allows the pumped air to enter from one side and blocks from the other . Similarly a rectifier diode allows the flow of current only through one direction. Its called the low forward voltage drop of a rectifier diode.
Which material used in diode?
A p–n junction diode is made of a crystal of semiconductor, usually silicon, but germanium and gallium arsenide are also used.
What is a diode made up of?
The first semiconductor diodes, called cat's whisker diodes, developed around 1906, were made of mineral crystals such as galena. Today, most diodes are made of silicon, but other semiconductors such as selenium or germanium are sometimes used.
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