물리전자 연습 문제 Then ** 교재에 풀이가 나와있는 example들을 먼저 풀어 볼 것. b g a E E f eV F no cm 0.2 1.24 x10 0.3 2.61x10 0.4 5.49 x10 c 3 3.1 ni N C N V exp 2 FG E IJ H kT K 16 g 14 12 (a) Silicon T K b g eV kT ni cm 3 200 0.01727 7.68 x10 400 0.03453 2.38 x10 600 0.0518 9.74 x10 4 (a) po N v exp LM a E E f OP N kT Q F v or 12 po 1.04 x10 exp 19 LM a E E f OP N 0.0259 Q F v 14 Then (b) Germanium b g T K ni cm 200 ni cm 10 16 5.72 x10 600 3.82 x10 4.61x10 0.3 9.70 x10 0.4 2.04 x10 9 12 3.11 (a) E c E F kT ln FG N IJ Hn K c o 3.9 (a) no N c exp LM a E E f OP N kT Q c FG 2.8x10 IJ 0.195 eV H 15. x10 K F N IJ (b) E E kT lnG HpK 0.0259 ln F 19 16 v or F no 2.8 x10 exp 19 3 15 13 1.38 3.28 x10 8.60 x10 0.2 3 14 400 po cm b g 3 2.16 x10 v F (c) GaAs b g a E E f eV LM a E E f OP N 0.0259 Q c F v o 12 FG 1.04 x10 IJ 0.198 eV H 5x10 K F N IJ (c) E E kT lnG Hn K 19 0.0259 ln 15 c c F o 3.22 F 375I 0.03238 eV H 033K F 375I n b2.8 x10 gb1.04 x10 g H 300K F 112. I exp H 0.03238K kT 0.0259 3 2 19 19 i FG 4.7 x10 IJ 0.0892 eV H 15. x10 K F N IJ (d) E E kT lnG HpK F 7 x10 IJ 0.188 eV 0.0259 lnG H 5x10 K 17 0.0259 ln 16 Or v F ni 5.41x10 cm 2 23 v o and 18 15 b (a) po 3.20 ni b15. x10 g no 3x10 10 2 (a) po 375 I gFH 300 K 3.91x10 cm 3/ 2 N c 2.8 x10 19 2 ni 19 5.41x10 3 x10 no or 7 po 7.5 x10 cm 15 po N v exp 16 4 po 180 . x10 cm (b) p-type 23 2 or (c) 6 3 LM a E E f OP N kT Q F v so F N IJ E E kT lnG HpK (b) n-type (c) no N c exp 3 LM a E E f OP N kT Q c F so E c E F kT ln FG N IJ Hn K c o v F v o 0.03238 ln 0.0259 ln FG 1.04 x10 IJ H 7.5x10 K FG 3.91x10 IJ H 3x10 K 19 16 19 15 or E F E v 0.187 eV or E c E F 0.232 eV 3 F N I n n H2K 2 5x10 b5 x10 g b8.54 x10 g 3.36 2 Nd 2 d O (a) nO N d 2 x10 cm 3 10 2 15 2 pO ni b15. x10 g 2 x10 nO pO 1125 . x10 cm 5 i 13 nO 1.49 x10 cm 14 3 Also (b) pO N a 10 cm 13 2 or 15 16 2 13 3 ni b8.54 x10 g nO 1.49 x10 2 pO 3 13 2 14 po 4.89 x10 cm 13 ni b15. x10 g pO 10 2 nO 2 10 16 nO 2.25 x10 cm 4 3 3.49 (c) nO pO ni 15 . x10 cm 10 3 E Fi E F kT ln (d) T 400 K kT 0.03453 eV b 19 19 12 3 F N I n p H2K 2 a O For Germanium: Using results from Problem 3.1 b g T K kT eV ni cm 200 0.01727 2.16 x10 400 0.03453 0.0518 8.6 x10 600 2 Na 3 10 14 3.82 x10 16 2 i b5x10 g b2.38x10 g 5x10 13 13 2 12 2 pO or pO 1.0 x10 cm 14 ni b2.38x10 g pO 10 2 12 nO 5.66 x10 cm 10 400 2 600 14 3 (e) T 500 K kT 0.04317 eV b I expF 112. I or gb1.04 x10 gFH 500 H 0.04317 K 300 K 3 ni 2.8 x10 19 ni 8.54 x10 cm Now 13 19 3 Na 2 T K 3 200 Also 2 O i I expF 112. I or gb1.04 x10 gFH 400 H 0.03453K 300 K ni 2.38 x10 cm nO FG p IJ Hn K 3 ni 2.8 x10 2 3 F N I n and N 10 cm H2K p bcm g E E eV 2 2 a 15 i a 3 O 1.0 x10 Fi 15 1.49 x10 F 0.1855 15 0.01898 16 0.000674 3.87 x10 3