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Lecture7

# Lecture7 - Quiz II Bonding forces in solid Schematic band...

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EE 332 Spring 2013 Quiz II Bonding forces in solid Schematic band diagram (E, k ) relationship, find band edges, and effective mass of electron and hole

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EE 332 Semiconductor Materials and Devices Lecture 7. Temperature Dependence of Carrier Concentrations and Charge Neutrality 1. Temperature Dependence of Carrier Concentration 2. Compensation and Space Charge Neutrality
EE 332 Spring 2013 Electron and Hole Concentration

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EE 332 Spring 2013 f ( E ) and Fermi-Level E F : Fermi Level at which an energy state has a probability of ½ of being occupied by an electron
EE 332 Spring 2013 Equilibrium Electron Concentration

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EE 332 Spring 2013 Carrier Concentration vs. Intrinsic Concentration -0.05 0.00 0.05 Carrier Density E F -E Fi (eV) n 0 n i p 0 p-type n-type
EE 332 Spring 2013 Example Hint:

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EE 332 Spring 2013 Solution Since B (trivalent) is a p-type dopant in Si, hence, the material will be predominantly p-type, and since N A >>n i , therefore, p 0 will be approximately equal to N A , and n 0 = n i 2 /p 0 = 2.25 x 10 4 cm -3 .
EE 332 Spring 2013 Example 2 (Problem 3.11)

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Lecture7 - Quiz II Bonding forces in solid Schematic band...

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