Table of Contents
What are the characteristics of a PN junction diode?
V-I Characteristics of P-N Junction Diode
- Zero bias.
- Forward bias.
- Reverse bias.
What is the principle of PN junction?
A pn junction diode is a two terminal single crystal semiconductor device whose one side is doped with acceptors and other side by donors. Doping with acceptor creates p type semiconductor while doping with donors produces n type. Thus a pn junction is formed in diode.
Which material is used for PN junction?
The p-n junction diode is made from the semiconductor materials such as silicon, germanium, and gallium arsenide. For designing the diodes, silicon is more preferred over germanium.
What are the IV characteristics of PN junction diode?
I-V Characteristic Curve of a Diode When the forward voltage exceeds the diodes P-N junctions internal barrier voltage, which for silicon is about 0.7 volts, avalanche occurs and the forward current increases rapidly for a very small increase in voltage producing a non-linear curve.
Why pn junction is called diode?
Why is p-n-junction is also called a junction diode? Solution : A p-n-junction allows a large current to flow through it when forward biased and it offers a high resistance when reverse biased. The unidirectional property is similar to that of vacuum diode. Hence, p-n-junction is also called a junction diode.
What is the thickness of pn junction?
There is very small region { which is in order of micro metre } . This region is known as depletion region. so, the thickness of PN− junction { depletion region } is in order of 10−6m.
Why a pn junction is called a diode?
Text Solution. Solution : A p-n-junction allows a large current to flow through it when forward biased and it offers a high resistance when reverse biased. The unidirectional property is similar to that of vacuum diode. Hence, p-n-junction is also called a junction diode. Loading Books.
What is depletion region in pn junction?
Depletion region or depletion layer is a region in a P-N junction diode where no mobile charge carriers are present. Depletion layer acts like a barrier that opposes the flow of electrons from n-side and holes from p-side.
Why is it called depletion region?
The depletion region is so named because it is formed from a conducting region by removal of all free charge carriers, leaving none to carry a current.
What is leakage current in PN junction diode?
Solution : (i) The leakage current of diode is the current that the diode will leak when a reverse voltage is applied to it. (ii) In a reverse biased diode, some current flows through the depletion region. This current is called leakage current . It is dependent on minority carriers.