P-N junction diode, current components, junction capacitance, junction diode, as a circuit element, special types of P-N junctions. P-N junction diodes, current components, junction capacitance, junction diode as a circuit element.


Bachelor in Electronics and Communications Engineering


  • P-N junction diode as a device, P-N junction as a circuit element, Special types of p-n junction rndiodes, Optoelectronic devices.


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Course Content

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2Intrinsic and extrinsic semiconductors. Trivalent or pentavalent dopents,Conductance
3Density of states. Electron and hole distribution in semiconductors using Fermi level distribution. Free carrier density in terms of mixed dopant density.
4P-N junction under no bias. Distribution of electrons, holes, ionized donors , and ionized acceptors. Depletion region. Built-in-Voltage.
5Capacitive effect of a P-N junction. Solutions of Possion?s equation in one dimension both for abrupt and graded junctions. Determination of the maximum electric filed. Width of the depletion layer. Determination of the junction capacitance for both types.
6Continuity equation. Generation mechanism of carriers. Recombination mechanism and life time. Boundary conditions as a function of bias. Current density as a function of the junction voltage in a p-n junction.
77th Week Exam.
8P-N junction characteristics. Low and high injection currents. Series resistance. Shunt resistance. Saturation current.
9P-N junction diode as a circuit element . Half wave and full wave rectifiers. Clipping circuits, Clamping circuits. Average output voltage.
10Breakdown mechanisms. Zener diode and applications.
11Varactors. The effect of doping profile on the characteristics. Application in tuning circuits.
12Switching diodes, switching speed, metal-semiconductor junctions, Schotky diodes
13Tunnel diode. The concept of tunneling. Conditions for tunneling. Qualitative evaluation of tunneling current. I-V characteristics of a tunnel diode. The concept of negative differential resistance. rn
14Sources of light. Types of light: white, monochromatic and coherent. Light emitting diode (LED) properties, construction and operation. Semiconductor laser properties, construction, and operation: comparison and the use of each.
15Photovolatic cells. Solar energy. Cell performance. Equivalent circuit. Parameters.
16Final Examination

Markets and Career

  • Generation, transmission, distribution and utilization of electrical power for public and private sectors to secure both continuous and emergency demands.
  • Electrical power feeding for civil and military marine and aviation utilities.
  • Electrical works in construction engineering.

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