|Electronic And Opto-Electronic
Physical Basis of Semiconductors: Review of energy bands, Effective mass, Fermi level in intrinsic and extrinsic semiconductors, Effect of temperature, Carrier concentration and mobility on Fermi level. Hall effect, Drift and diffusion currents, Elinstein relation, Element and compound semiconductor materials: Classification of semiconductors into element, Binary, Ternary and quaternary compounds, Conduction mechanisms, Amorphous semiconductors, Oxide and magnetic semiconductors.
Junctions and Junction Devices: Contact potential explanation based on band structure, M-S contact and its properties, Barrier layer, P-N junction, Potential barrier and barrier width, Forward and reverse saturation current junction capacitance.
Processing of Semiconductor Materials: Purification, Zone refining and zone floating methods, Czochralski and Bridgemann techniques, Epitaxial growth methods, Liquid phase, Vapour phase and molecular beam epitaxy. Introduction of impurities, Junction, Successive doping method, Epitaxial and diffusion methods, MESA and planar structure doping of amorphous semiconductors.
Optical Processes in Semiconductors: Radiative and non-radiative recombination, Absorption in semiconductors. Luminescence from quantum well, Photo luminescence and phosphorescence, Phototransistors electro luminescence process LEDís their structures and choice of materials, Polymer LEDS.
Organic Semiconductors: Materials for molecular electronics.
Semiconductor Lasers: Homojunction and heterojunction.
Materials for Optical Communication: Optical fibers, Single and multimode electro-optic effect, Kerr and pockels effect liquid crystal displays and display materials, TN and STN effect.