Phy Unit 4: Semiconductor Physics and Ultrasonics

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Syllabus:

Semiconductor Physics

  1. Valence Band, Conduction Band, and Band Gap Energy
  2. Classification of Solids on the Basis of Band Theory
  3. Fermi Level and Fermi Energy for Metals
  4. Fermi-Dirac Distribution Function and Its Temperature Dependence
  5. Position of Fermi Level in Intrinsic Semiconductors (Derivation)
  6. Fermi Level for Extrinsic Semiconductors
  7. Working of PN Junction Diode on the Basis of Fermi Energy
  8. Solar Cell
    • Principle
    • Working
    • IV Characteristics
    • Efficiency and Fill Factor
    • Measures to Improve Efficiency of Solar Cell
    • Advantages and Applications in Environmental Sustainability
  9. Hall Effect
    • Derivation for Hall Voltage and Hall Coefficient
    • Related Numerical Problems

Ultrasonics

Related Numerical Problems

Characteristics and Properties of Ultrasonic Waves

Generation of Ultrasonic Waves by Inverse Piezoelectric Effect (Using Transistor)

Engineering Applications

Thickness Measurement

Flaw Detection