9.SSD (EE-2080)_Lecture09

9.SSD (EE-2080)_Lecture09 - SDM(EE-2080) Lecture 9 Dr. Shiv...

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Unformatted text preview: SDM(EE-2080) Lecture 9 Dr. Shiv Govind Singh sgsingh@iith.ac.in Assistant Professor Electrical Engineering Semester 2, Y-2010/11 Reference Text Book: 1. Physics of Semiconductor Devices, S. M. Sze , John Wiley & Sons (1981). 2. Solid State Electronics by Ben G. Streetman and Sanjay Banerjee , Prentice Hall International , Inc. 3. Semiconductor Physics and Devices, Donald A. Neamen, Tata Mcgraw- Hill Publishing company Limited. Reference Book: 1 . Fundamentals of Solid-State Electronic Devices, C. T. Sah , Allied Publisher and World Scientific, 1991. 2. Complete Guide to Semiconductor Devices, K. K. Ng , McGraw Hill, 1995. 3. Solid state physics, Ashcroft & Mermins . 4. Introduction to Solid State Electronics, E. F. Y. Waug , North Holland, 1980. Recap • Effective Mass • Electronics properties of bands • Solids forms Out line • Measurement of effective mass • 3 D E-K diagram • Measurement of bandgap • No. of electrons in Semiconductor Electron and holes in Semiconductor ve dk E d m h     ) / /( * 2 2 2  ve dk E d m e    ) / /( * 2 2 2  Electron occupy lower end of band so don’t have much energy hence classical concept can apply. Current in equilibrium? After application of electric field. dt dk qF /    dt dk qF /   For e- For holes E Measurement of effective mass E K Cont. Variable magnetic field Microwave frequency (fixed) Bcon Bval 3-D E-k Diagram Ge Si GaAs GaAs Measurement of Band Gap E K a Energy Cont. I in I out I in I out Energy No. of states per Band a N: total no of atoms L Let us assume finite length L Considering cyclic BC we can assume that Ψ(x+L)= Ψ(x) Bloch function exp [ik(x+L)u k (x+L)]= exp [ik(x+L)u k (x)] K=2 p n/L where n is 1,2,3…. (a) No of possible wavefunction in the range dk is therefore...
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This note was uploaded on 07/19/2011 for the course EE 211 taught by Professor Sgsingh during the Spring '11 term at IIT Kanpur.

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9.SSD (EE-2080)_Lecture09 - SDM(EE-2080) Lecture 9 Dr. Shiv...

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