Electronic Devices 1 | 1. Introduction to Semiconductor Physics by Pavan | Learn Smarter
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1. Introduction to Semiconductor Physics

Semiconductors play a crucial role in modern electronics, positioned between conductors and insulators in terms of electrical conductivity. Their behavior is explained through energy band theory, which describes how temperature and doping affect conductivity. This chapter covers the classification of materials, intrinsic and extrinsic semiconductors, energy band diagrams, and current mechanisms, highlighting the essential applications of these principles in electronic devices.

Sections

  • 1

    Introduction To Semiconductor Physics

    This section introduces the basics of semiconductor physics, detailing their characteristics, types, and behaviors in electronic applications.

    Learning Practice

  • 1.1

    Overview Of Semiconductor Physics

    Semiconductors have electrical conductivity between conductors and insulators and are essential in modern electronics.

    Learning Practice

  • 1.2

    Classification Of Materials By Conductivity

    This section classifies materials based on their electrical conductivity, distinguishing between conductors, semiconductors, and insulators.

    Learning Practice

  • 1.3

    Atomic Structure Of Semiconductors

    This section discusses the atomic structure of semiconductors, focusing on Silicon and Germanium, their behavior at various temperatures, and the concept of energy bands.

    Learning Practice

  • 1.4

    Intrinsic Semiconductors

    Intrinsic semiconductors are pure materials that generate electron-hole pairs through thermal excitation, with their properties significantly influenced by temperature.

    Learning Practice

  • 1.5

    Extrinsic Semiconductors

    Extrinsic semiconductors are modified versions of intrinsic semiconductors, doped with impurities to enhance conductivity and create n-type and p-type materials.

    Learning Practice

  • 1.6

    Energy Band Diagrams

    Energy band diagrams visually represent the energy levels in semiconductors, crucial for understanding their behavior under different conditions.

    Learning Practice

  • 1.7

    Drift And Diffusion Currents

    This section discusses the concepts of drift and diffusion currents in semiconductors, defining their causes and how they contribute to overall electric current.

    Learning Practice

  • 1.8

    Mass Action Law

    The Mass Action Law states that in an intrinsic semiconductor, the product of the concentrations of electrons and holes is equal to the square of the intrinsic carrier concentration.

    Learning Practice

  • 1.9

    Summary Of Key Concepts

    Semiconductors serve as intermediates between conductors and insulators, with their conductivity influenced by temperature and doping.

    Learning Practice

  • 1.10

    Applications

    This section covers various applications of semiconductor physics in modern electronic devices.

    Learning Practice

References

ee-ed1-1.pdf

Class Notes

Memorization

What we have learnt

  • Semiconductors have electri...
  • They can be intrinsic (pure...
  • Understanding drift and dif...

Revision Tests