14.SSD (EE-2080)_Lecture14_7thfeb [Compatibility Mode]

14.SSD (EE-2080)_Lecture14_7thfeb [Compatibility Mode] -...

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DM(EE- 080) SDM(EE 2080) Lecture 14 Dr. Shiv Govind Singh sgsingh@iith.ac.in gg @ Assistant Professor Electrical Engineering Semester 2, Y-2010/11
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Reference Text Book: hysics of Semiconductor Devices MS ze John Wiley & Sons 1. Physics of Semiconductor Devices, S. M. Sze , John Wiley & Sons (1981). 2. Solid State Electronics by Ben G. Streetman and Sanjay Banerjee , rentice Hall International , Inc. Prentice Hall International , Inc. 3. Semiconductor Physics and Devices, Donald A. Neamen, Tata Mcgraw-Hill Publishing company Limited. eference Book: Reference Book: 1 . Complete Guide to Semiconductor Devices, K. K. Ng , McGraw Hill, 1995. 2. Introduction to Solid State Electronics, E. F. Y. Waug , North Holland, 1980. 3.
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Recap oltzmann Transport Equation Boltzmann Transport Equation Let f(x,y,z,p x ,p y ,p z ), distribution of particles in 6 dimensional phase space So time “dt” earlier f was localized in phase space at f(x-v x dt,y-v y dt,z-v z dt, p x -F x dt, p y -F y dt, F z -v z dt) Change of f in time dt df=f(x-v x dt,y--v y dt,z-v z dt,p x -F x dt, p y -F y dt, F z -v z dt)- f(x,y,z,p x ,p y ,p z ), Taylors expansion gives ) ,p ,p f(x,y,z,p dt F z f - F y f - F x f - v z f - v y f - v x f )- ,p ,p f(x,y,z,p df z y x z y x z y x z y x = f F f v dt df p = ( ) collision p dt df f F f v dt df / + =
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BE Solutions based on relaxation time approximation If applied electric field F applied to system at t<0 and o diffusion gradient exist i e no diffusion gradient exist i.e.
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14.SSD (EE-2080)_Lecture14_7thfeb [Compatibility Mode] -...

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