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Unformatted text preview: 300K? h) What is the majority carrier at 300K? i) What is the doping type at 300K? Problem 2 Intrinsic Carrier Concentration Dependence on Temperature The intrinsic carrier concentration n i varies with temperature as n T = AT 3 2 exp G i ( ) 2 E kT where A = 3.32 x 10 15 cm 3 /K 3/2 , k = 8.62 10 5 eV / K , T is the temperature in K, and E G is the bandgap in eV (for Si E G =1.1 eV). Assume that E G does not change with temperature and n i =1x10 10 cm 3 at 300 K. A sample is doped with P 10 14 cm 3 . At T=900K, is the sample intrinsic or extrinsic? Problem 3 Web lab demo...
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This note was uploaded on 09/24/2010 for the course EE 6.012 taught by Professor Charlessodini during the Spring '08 term at MIT.
- Spring '08