Question

explain p-n junction diode in detail..it's urgent

Answer 1

Hey, here is your answer

A p n junction dode is a boundary or interface between two types of semiconductor. It allows electric charges to flow in one direction but not in the opposite direction. It is created by doping. If two separate pieces of material were used, this would introduce a gain boundary between the semiconductor that would severely inhibit by scattering the electrons and holes.

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Answer 2

A P-N junction diode is a semiconductor device. It is formed by combining P-type and N-type semiconductors together. It has contacts (or leads) for providing external voltage. It is a two terminal device.

According to the polarity of the applied voltage, the diode may be working in forward biased condition, or in reverse biased condition. If the positive terminal of the external supply is connected to the P side and negative terminal to the N side, then the diode is said to be in forward biased condition. The width of the depletion layer decreases and the diode conducts easily. When the P side of the diode is connected to the negative terminal and N side to the positive terminal of the supply, the diode is said to be in reverse biased condition. The width of the depletion layer increases and the diode offers very high resistance at this condition.