Subject Details
Dept     : ECE
Sem      : 1
Regul    : 2019
Faculty : Vijayakumar B
phone  : NIL
E-mail  : vijay.b.phy@snsce.ac.in
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Lecture Notes

UNIT 2:
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Types of lasers – Nd:YAG, CO2 Laser
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Einstein’s A and B coefficients -derivation.
UNIT 3:
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Intrinsic Semiconductors – Energy band diagram
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Direct and indirect semiconductors
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Carrier concentration in intrinsic semiconductors
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Extrinsic semiconductors - Carrier concentration in N-type
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Carrier concentration in P-type semiconductors
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Solar cell-V-I characteristics.
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Problems on carrier concentration
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variation of fermi energy level with temperature and impurity concentration
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Photo detectors (PIN & Avalanche)
UNIT 4:
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Bravais lattices, directions and planes in a crystal
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Single crystalline, polycrystalline and amorphous materials – single crystals: unit cell, crystal systems,
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Miller indices – inter-planar distances
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coordination number and packing factor for SC, BCC,
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FCC and HCP
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crystal imperfections: point defects, line defects – Burger vectors, stacking faults
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Diamond structures
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Growth of single crystals: solution growth techniques (Bridgman method)
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Growth of single crystals: melt growth techniques (Czochralski method)