NCERT Class 12 Physics Chapter 14 Semiconductor Electronic Notes (Handwritten Notes & PDF Download)

Physics is a very important subject for students. It may be hard for some students. For helping students here we have shared NCERT Class 12 Physics Chapter 14 Semiconductor Electronic Handwritten Notes.

The Semiconductor Electronic notes is a best resource for students who are preparing for their board exam because it compile the entire lesson in short and include every important topic.

NCERT Class 12 Physics Chapter 14 Semiconductor Electronic Notes

Previous Chapter: Nuclei

Other Subjects:
Class 12 Biology Notes
Class 12 Chemistry Notes

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Semiconductor Electronic Notes PDF

We have also shared the PDF of Semiconductor Electronic Notes so students don’t feel any difficulty in reading the notes. You can ask your doubts in the comment section. We will be happy to help you.

Key Points: Semiconductor Electronic Notes PDF

• Metals :- They possess very low resistivity (or high conductivity).
• Semiconductors : They have resistivity or conductivity intermediate to metals and insulators.
• Insulators : They have high resistivity (or low conductivity) .

Energy Band Diagrams :- The electrons in the same orbit exhibit different energy levels. The grouping of these different energy levels is known as the energy band.

Valence band The valence electrons contain a series of energy level and form an energy band known as the valence band. The valence band has the highest occupied energy.

Conduction Band :- The valence electrons are not tightly held to nucleus due to which a few of these valence electrons leave the outermost orbit even at room temp. and become free electron to conduct the current and are known as conduction e-

Energy gap band : Energy gap between conduction band and Valence band in solid is called energy gap.

Semiconductors are of two types

• Intrinsic semiconductor
• Extrinsic Semiconductor

Intrinsic semi-conductor :- Pure semi-conductor are known as intrinsic semi-conductors. [ Ge,Si ] Note.

• No. of holes approx Number of electron.
• Net charge on lattice will be zero.
• Majority charge carrier are both holes and
• electrons.
• They have low conductivity at room temper-ature.

Features of Notes

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