What is pn junction diode explain in brief?
A p-n junction diode is a basic semiconductor device that controls the flow of electric current in a circuit. It has a positive (p) side and a negative (n) side created by adding impurities to each side of a silicon semiconductor. The symbol for a p-n junction diode is a triangle pointing to a line.
What is the main function of PN diode?
A p-n junction diode is two-terminal or two-electrode semiconductor device, which allows the electric current in only one direction while blocks the electric current in opposite or reverse direction. If the diode is forward biased, it allows the electric current flow.
Why is pn junction called a 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 are the types of PN junction diode?
Different types of PN-junction diodes
- Light Emitting Diode (LED) Very much used in a dancing light display of music systems and information boards on railway stations.
- Photodiode. A PN junction diode made of photosensitive semiconductor is called a photodiode.
- Solar Cell.
- Zener Diode.
How to identify pn junction diode?
testing P–N Junction Diodes. A diode can be tested by checking the forward-to- reverse-resistance ratio with an ohmmeter. The resistance ratio indicates the ability of the diode to pass current in one direction and block current in the other direction. A germanium diode has a low forward resistance of several hundred V.
What is pn junction theory?
What is the PN junction theory? Definition: A p-n junction is an interface or a boundary between two semiconductor material types, namely the p-type and the n-type, inside a semiconductor. The p-side or the positive side of the semiconductor has an excess of holes and the n-side or the negative side has an excess of electrons.
What is a PN junction diode?
A p-n junction diode is a basic semiconductor device that controls the flow of electric current in a circuit. It has a positive (p) side and a negative (n) side. … To make a p-n junction diode, a different impurity is added to each side of a silicon semiconductor to change how many extra holes or electrons are present.
What is pn junction?
Due to the addition of boron in silicon holes are created in the silicon structure.