PH3254 Physics For Electronics Engineering
Prepared by
S.Santhosh (Admin)
Important questions
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Unit:1
1. Bravis lattice
2.Example use of Miller indices growth techniques
3. Sc BCC SCC
Unit:2
1.Density of energy level
2.Thermal Conductivity (or) Energy bonds
3.Fermi level 4.dia ,para,ferro magnets**
Unit:3
1.Carrier concentration in N-type & P-type semiconductors**
2.Hall effect an devices,Ohmic contacts,Schottky diode
3.Energy band diagram,CC of intrincsic semiconductor
Unit:4
1.P-N diode ,Solar cell, OLED
2. RAre optical absorption, loss and gain
3.Scattering of light in Semi conductors
Unit:5
1.Carbon Nano tubes(7or13m)**,Nano wires
2.Density of States (13m)**
Extra
1.Spintronics
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Share it as link alone . don't share it as screenshot or any text material if u found this anywhere kindly report me . #Admin WhatsAppContact uS
*These questions are expected for the exams This may or may not be asked for exams All the best.... from admin Santhosh
Thanks for your love and support guys keep supporting and share let the Engineers know about Us and leave a comment below for better improvements If there is any doubt feel free to ask me I will clear if I can or-else I will say some solutions ..get me through WhatsApp for instant updates ~$tuff$£ctorSYllabuSUNIT I CRYSTALLOGRAPHY Crystal structures: Crystal lattice – basis - unit cell and lattice parameters – crystal systems and Bravais lattices – Structure and packing fractions of SC, BCC, FCC, diamond cubic, NaCL, ZnS structures – crystal planes, directions and Miller indices – distance between successive planes – linear and planar densities – crystalline and noncrystalline materials –Example use of Miller indices: wafer surface orientation – wafer flats and notches – pattern alignment - imperfections in crystals. UNIT II ELECTRICAL AND MAGNETIC PROPERTIES OF MATERIALS Classical free electron theory - Expression for electrical conductivity – Thermal conductivity, expression - Quantum free electron theory :Tunneling – degenerate states – Fermi- Dirac statistics – Density of energy states – Electron in periodic potential – Energy bands in solids – tight binding approximation - Electron effective mass – concept of hole. Magnetic materials: Dia, para and ferromagnetic effects – paramagnetism in the conduction electrons in metals – exchange interaction and ferromagnetism – quantum interference devices – GMR devices. UNIT III SEMICONDUCTORS AND TRANSPORT PHYSICS Intrinsic Semiconductors – Energy band diagram – direct and indirect band gap semiconductors – Carrier concentration in intrinsic semiconductors – extrinsic semiconductors - Carrier concentration in N-type & P-type semiconductors – Variation of carrier concentration with temperature – Carrier transport in Semiconductors: Drift, mobility and diffusion – Hall effect and devices – Ohmic contacts – Schottky diode. UNIT IV OPTICAL PROPERTIES OF MATERIALS Classification of optical materials – Optical processes in semiconductors: optical absorption and emission, charge injection and recombination, optical absorption, loss and gain. Optical processes in quantum wells – Optoelectronic devices: light detectors and solar cells – light emitting diode – laser diode - optical processes in organic semiconductor devices –excitonic state – Electro-optics and nonlinear optics: Modulators and switching devices – plasmonics. UNIT V NANO DEVICES Density of states for solids - Significance between Fermi energy and volume of the material – Quantum confinement – Quantum structures – Density of states for quantum wells, wires and dots – Band gap of nanomaterials –Tunneling – Single electron phenomena – Single electron Transistor. Conductivity of metallic nanowires – Ballistic transport – Quantum resistance and conductance – Carbon nanotubes: Properties and applications - Spintronic devices and applications – Optics in quantum structures – quantum well laser.
Contact uS
*These questions are expected for the exams This may or may not be asked for exams
All the best.... from admin Santhosh
Thanks for your love and support guys keep supporting and share let the Engineers know about Us and leave a comment below for better improvements
If there is any doubt feel free to ask me I will clear if I can or-else I will say some solutions ..get me through WhatsApp for instant updates ~$tuff$£ctorUNIT I CRYSTALLOGRAPHY
Crystal structures: Crystal lattice – basis - unit cell and lattice parameters – crystal systems and
Bravais lattices – Structure and packing fractions of SC, BCC, FCC, diamond cubic, NaCL, ZnS
structures – crystal planes, directions and Miller indices – distance between successive planes –
linear and planar densities – crystalline and noncrystalline materials –Example use of Miller
indices: wafer surface orientation – wafer flats and notches – pattern alignment - imperfections in
crystals.
UNIT II ELECTRICAL AND MAGNETIC PROPERTIES OF MATERIALS
Classical free electron theory - Expression for electrical conductivity – Thermal conductivity,
expression - Quantum free electron theory :Tunneling – degenerate states – Fermi- Dirac statistics
– Density of energy states – Electron in periodic potential – Energy bands in solids – tight binding
approximation - Electron effective mass – concept of hole. Magnetic materials: Dia, para and
ferromagnetic effects – paramagnetism in the conduction electrons in metals – exchange
interaction and ferromagnetism – quantum interference devices – GMR devices.
UNIT III SEMICONDUCTORS AND TRANSPORT PHYSICS
Intrinsic Semiconductors – Energy band diagram – direct and indirect band gap semiconductors –
Carrier concentration in intrinsic semiconductors – extrinsic semiconductors - Carrier
concentration in N-type & P-type semiconductors – Variation of carrier concentration with
temperature – Carrier transport in Semiconductors: Drift, mobility and diffusion – Hall effect and
devices – Ohmic contacts – Schottky diode.
UNIT IV OPTICAL PROPERTIES OF MATERIALS
Classification of optical materials – Optical processes in semiconductors: optical absorption and
emission, charge injection and recombination, optical absorption, loss and gain. Optical processes
in quantum wells – Optoelectronic devices: light detectors and solar cells – light emitting diode –
laser diode - optical processes in organic semiconductor devices –excitonic state – Electro-optics
and nonlinear optics: Modulators and switching devices – plasmonics.
UNIT V NANO DEVICES
Density of states for solids - Significance between Fermi energy and volume of the material –
Quantum confinement – Quantum structures – Density of states for quantum wells, wires and dots
– Band gap of nanomaterials –Tunneling – Single electron phenomena – Single electron
Transistor. Conductivity of metallic nanowires – Ballistic transport – Quantum resistance and
conductance – Carbon nanotubes: Properties and applications - Spintronic devices and
applications – Optics in quantum structures – quantum well laser.