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ECE340_L14_S14_Distribution - M,W,F 12:00 12:50(X 165...

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M,W,F 12:00-12:50 (X), 165 Everi± Lab MWF 13:00-13:50 (E), 135 Mechanical Engineering Building Lecture #14, 2/21/14 Professor John Dallesasse Department of Electrical and Computer Engineering 2114 Micro and Nanotechnology Laboratory Tel: (217) 333-8416 E-mail: [email protected] Office Hours: Mon, Wed 14:00 – 15:00
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Quiz Results Sec_on A; AVG: 4.29 (3.34), STDEV: 2.13 (2.6) Sec_on C; AVG: 4.57 (3.83), STDEV: 2.38 (2.77) Sec_on E; AVG: 5.4 (5.03), STDEV: 2.24 (2.56) Sec_on X; AVG: 4.12 (3.74), STDEV: 2.48 (2.65) Any regrade request due Monday Chea_ng comment Compass Codes: W#: Quiz taken in wrong sec_on, syllabus states that you must take the quiz in your sec_on, there will be a penalty if not previously arranged E: Excused (prorated score based upon other quizzes) S: Sick, Course policy stated in syllabus will be applied A: Absent with no excuse, student will receive a “0”
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Hour Exam 1 Tuesday, March 4 th , 7:00-8:00 pm Loca_on announced next week, likely 228 NHB for sec_ons E & X Conflict no_Fca_on by Tuesday 2/25 to Ben Kessler, per e-mail
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Tenta_ve Schedule [1] JAN 22 Course overview JAN 24 Intro to semiconductor electronics JAN 27 Materials and crystal structures JAN 29 Bonding forces and energy bands in solids JAN 31 Metals, semiconductors, insulators, electrons, holes FEB 3 Intrinsic and extrinsic material FEB 5 Distribu_on func_ons and carrier concentra_ons FEB 7 Distribu_on func_ons and carrier concentra_ons FEB 10 Temperature dependence, compensa_on FEB 12 Conduc_vity and mobility FEB 14 Resistance, temperature, impurity concentra_on FEB 17 Invariance of Fermi level at equilibrium FEB 19 Op_cal absorp_on and luminescence FEB 21 Genera_on and recombina_on 4 **Subject to Change**
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Tenta_ve Schedule [2] FEB 24 Quasi-Fermi levels and photoconduc_ve devices FEB 26 Carrier difusion FEB 28 Built-in ±elds, difusion and recombina_on MAR 3 Review, discussion, problems (2/4 exam) MAR 5 Steady state carrier injec_on, difusion length MAR 7 p-n junc_ons in equilibrium & contact poten_al MAR 10 p-n junc_on Fermi levels and space charge MAR 12 Con_nue p-n junc_on space charge MAR 14 NO CLASS (EOH) MAR 17 p-n junc_on current flow MAR 19 Carrier injec_on and the diode equa_on MAR 21 Minority and majority carrier currents 3/24-3/28 Spring Break MAR 31 Reverse-bias breakdown APR 2 Stored charge, difusion and junc_on capacitance APR 4 Photodiodes, I-V under illumina_on 5 **Subject to Change**
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Today’s Discussion Genera_on & Recombina_on Carrier Life_me Quasi Fermi Levels Assignments Topics for Next Lecture 6
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Terminology Reminder Equilibrium: No external perturbing excita_on is present except temperature, and there is no net mo_on of charge. Steady State : A non-equilibrium condi_on in which all perturbing processes are constant. In steady state, opposing processes are present that balance perturbing processes.
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Equilibrium Genera_on g(T) r n o (K) p o ± ± Generation and recombination are balanced: g T ( ) = g i = r i = α r n o p o = r n i 2 9 http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/imgkin/mxspd.gif An Analogy: Molecular Speed in an Ideal Gas Some electrons have sufficient energy to jump to the conduction band (phonon interactions)
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ECE340_L14_S14_Distribution - M,W,F 12:00 12:50(X 165...

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