, , . , Si, Ge, GaAs, JnP .
T=0 . . T=0 s = 1/r, r - .
. ( ) ³ Eg. . . . .
, . , , . , , , (.3.12). , , .
. .
- : . , , , . . . n0 p0 : n0 = p0 = ni; ni .
,
n00=ni2. (3.7)
, , - . , ( ). (3.7)
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:
1. . , Eg . , .
2. . , .
. .
Si As (.3.13). Si. . As e2 , e - Si (e 12). ,
D = - 0,049 . ³ D As , . As , Si .
, , . .
Si (.3.15). Si, . Si. 0,045 . Si , - . , , (.3.16). D = -V0,045 , , . , .
, , . .
. N >> ni, , n0 >> 0. n- . n- , .
N >> ni, 0 >> n0 . - . - , - . Si- ni =1010 -3. N 1013 -3. , , n0 1013-3. (3.7) 0 = ni / n0 = 107-3 n0 >> 0, n-. .
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