A Ge specimen is doped with Al . The concentration of acceptor atom is ~ 10 21 a t o m s m - 3 . Given that the intrinsic concentration of electron-hole pairs is ~ 10 19 m - 3 . The concentration of e

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A Ge specimen is doped with Al . The concentration of acceptor atom is ~ 10 21 a t o m s m - 3 . Given that the intrinsic concentration of electron-hole pairs is ~ 10 19 m - 3 . The concentration of electrons in the specimen is

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∴ n i 2 = n e n n 10 19 2 = n e × 10 21 g i v e n , n i = ~ 10 19 m - 3 , n h = ~ 10 21 a t o m m - 3 n e = 10 17 m - 3

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