Course NoCourse Title

UFC C055Semiconductors and Devices

LTPC

3104

1. Introduction: Elementary properties of semiconductors types of semiconductors intrinsic and extrinsic semiconductors p,n type semiconductors doping of semiconductors (high level and low level) electronic band structure.

2. Carrier transport and excess carrier phenomena carrier drift drift current density mobility effects - carrier diffusion diffusion current density total current density - graded impurity distribution effect of non-uniform impurity concentration -carrier generation and recombination excess carrier generation and recombination generation and recombination processes - phonons- high field effect velocity saturation - hot electron transport theory.

3. Thermal effects in semiconductors: thermal conductivity thermo-electric power thermo-magnetic effects condition of degeneracy - effective mass. Methods of determining of characteristic properties of semiconductors: the minimum energy gap Hall effect - mobility of electrons and holes carrier concentration energy levels in the forbidden band due to impurities minority carrier lifetime injection ratio.

4. Optical properties of semiconductors optical processes in semiconductors optical absorption processes interband absorption process free carrier absorption process excitonic effects emission spectrum stimulated emission - optical constants photon absorption coefficient - light absorption edge Photoconductivity effect practical applications of Photoconductivity - Dember effect Photovoltaic effect Photomagnetoelectric effect.

5. Applications of semiconductors use of semiconductors in electrical technology rectifiers transistors photodiode photoelectric power generator infra-red detector infra-red modulators thermopiles thermo-electric refrigerators non-linear resistors - thermistor, varistor, photoresistor.

References:1. S.M. Sze, Semiconductor Devices: Physics and Technology, Wiley Publishers, New York, 1985.2. S.P. Keller, Handbook on Semiconductors, vol.1-4, T.S. Moss Ed., North-Holland, Amsterdam, 1980.3. Donald A Neamen, An introduction to semiconductor devices, McGraw-Hill International Ed., New York, 2006.4. Sheng S Li, Semiconductor Physical Electronics, second edition, Springer, New York, 2006.5. Charles M Wolfe, Nick Holonyak, JR, Gregory E Stillman, Physical Properties of Semiconductors, Prentice Hall International Inc.,London 1989.6. Adir Bar. Lev., Semiconductors & Electronic Devices, Prentice Hall of India, New Delhi,1987.7. J.M. Martinez-Duarte, R.J.Martin-Palma and F. Agullo-Rueda, Nanotechnology for Microelectronics and Optoelectronics, Elsevier B.V, Netherlands, 2008.