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When a trivalent impurity is mixed in a pure semiconductor The conduction is mainly due to?

This is because a pure semiconductor has four valence electrons. A trivalent impurity has 3 valence electrons. When it is added, one atom of it forms bonds with three atoms of the semiconductor. Only three atoms are engaged in bonding.

What is application of N-type and p-type semiconductor?

n-type and p-type semiconductors finds a great use in manufacturing electronic components. Diode is a combination of n-type and p-type semiconductors extensively used as a rectifier. Transistors are manufactured by keeping a layer of one type of semiconductor between two layers of another type of semiconductor.

How is n-type and p-type semiconductor formed?

Pentavalent impurities Impurity atoms with 5 valence electrons produce n-type semiconductors by contributing extra electrons. Trivalent impurities Impurity atoms with 3 valence electrons produce p-type semiconductors by producing a “hole” or electron deficiency.

Which of the following is N type semiconductor?

Solution : Ge(Group 14) doped with As(Group 15) is an n-type semiconductor.

How P-type semiconductor are formed?

The extrinsic p-Type Semiconductor is formed when a trivalent impurity is added to a pure semiconductor in a small amount, and as a result, a large number of holes are created in it. A large number of holes are provided in the semiconductor material by the addition of trivalent impurities like Gallium and Indium.

What type of charge carriers are there in p-type semiconductor?

The less abundant charge carriers are called minority carriers; in n-type semiconductors they are holes, while in p-type semiconductors they are electrons. In an intrinsic semiconductor, which does not contain any impurity, the concentrations of both types of carriers are ideally equal.

Which is the most widely used semiconductor?


What is the main function of semiconductor?

A semiconductor can help controlled flow of electricity. The basic function of such a device is to switch ON and OFF the flow of electricity as and when required. A semiconductor device can perform the function of a vacuum tube with hundreds of times its volume.

What are the most commonly used semiconductors and why?

Why silicon is the most commonly used semiconductor? Silicon has much smaller leakage current than that of germanium. Silicon can be worked at a higher temperature as compared to germanium.