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
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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
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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
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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 .
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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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