Lecture10(2)

Ece 440 mohamed mohamed ee 332 spring 2013 example 1

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Unformatted text preview: 105 / cm3 14 4 10 D A 14 1013 EHP STEP 2: Given Gop find EHP: cm3 . s Check if low level injection holds. Low level holds since p n is less than the majority carrier doping (no) 3 13 1013 EHP p n gop . p 2 s 2 10 cm3 cm3 . s p n gop. p no 4 1014 / cm3 2.25 10 ni2 p po p p 2 1013 no 4 1014 20 p 2 1013 cm3 Minority Carrier Concentration ECE 440: Mohamed Mohamed EE 332 Spring 2013 Example 1 Solution (Conti) Solution (b) Draw energy band diagram with steady-state illumination of Ec, Ev, Ei, Fn, Fp (c) Find the quasi-Fermi levels Fn and Fp with steady-state illuminated relative to the intrinsic fermi level. 2 1013 n p cm 3 The electron and hole concentration are: p p0 p 2 1013 cm3 n n0 n 4 1014 2 1013 2 1013 cm3 Compute the Quasi Fermi levels: ECE 440: Mohamed Mohamed EE 332 Spring 2013...
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