Types of semiconductors
what is semiconductors?
is a conductor whose conductivity lies between insulator and conductor.
Types of semiconductors
- intrinsic
- extrensic
is a conductors which are in pure form without any impurities.
eg: silicon and germinium
Notes
numer of hole = number of electron
- majority charge carrier: Both hole and electron
- net charge is always zero
Extrinsic semiconductuors
is a semiconductors which are formed due to adding impurities to a conductors and it has two types and they are
- Ptype
- Ntype
is formed by adding trivalent impurities or impurity atom which has three valence electrons.
eg; Boron, Gallium,Indiumand aluminium.
Notes
- majority charge carrier is hole
- number of hole > number of electron
Ntype
is formed by adding pentavalent impurities or impurity atom having five valence electrons.
eg: arsenic, phosporus
Notes
- majority charge carrier is electrons
- number of hole <electron
Really brought short and productive facts all together i. e., about semi conductor. Great appreciation to you.
ReplyDeleteWow!! You have done great job on explicating definition and types of semiconductors with relevant examples. It did help me recollecting what we have been taught in class after reading your blog.
ReplyDeleteThe blog contained informations regarding semiconductors in detail as well as in simple words which was easy to understand
ReplyDeleteThank you pema...this some important points of unit two.. it will be very useful when revising for upcoming exams
ReplyDeleteIt was always interesting to learn about types of semi conductors and thank you for reminding me the important points on types and workings of different semi conductors
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