doping cases handout

doping cases handout - i>> |N D-N A | n = N D − N A 2...

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EE3901 n, p Carrier Concentration Approximations Case 1: Intrinsic Semiconductor (N A =0, N D =0) n = N D N A 2 + N D N A 2 2 + n i 2 p = N A N D 2 + N A N D 2 2 + n i 2 Case 2a: Semiconductor Doping dominated by Donors (N D >>N A , N D >>n i ) n = N D N A 2 + N D N A 2 2 + n i 2 p = N A N D 2 + N A N D 2 2 + n i 2 Case 2b: Semiconductor Doping dominated by Acceptors (N A >>N D , N A >>n i ) n = N D N A 2 + N D N A 2 2 + n i 2 p = N A N D 2 + N A N D 2 2 + n i 2 Case 3: Doped Semiconductor at High Temperature (n
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Unformatted text preview: i >> |N D-N A | ) n = N D − N A 2 + N D − N A 2 ⎛ ⎝ ⎞ ⎠ 2 + n i 2 p = N A − N D 2 + N A − N D 2 ⎛ ⎝ ⎞ ⎠ 2 + n i 2 Case 4: Compensated Semiconductor (N A , N D comparable) n = N D − N A 2 + N D − N A 2 ⎛ ⎝ ⎞ ⎠ 2 + n i 2 p = N A − N D 2 + N A − N D 2 ⎛ ⎝ ⎞ ⎠ 2 + n i 2...
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