j=kT/q, (1.1)
k ; T ( T =300 jT =0,026, 26), q .
, (1.2)
n ; p ; ni . , .
(1.3)
NA, ND .
- ,
jfp = j i - j p (1.4 )
jfn = j i + j n, (1.4 )
ji , :
j p = j ln (p/ni), (1.5 )
j n = j ln (n/ni) (1.5 )
.
, , (n = p = ni) , (n > ni) , ( > ni) .
- , , . . jf=const.
- n-
, (1.6 )
-
, (1.6 )
; mp, mn ; Dp Dn ; .
- , ,
, (1.7 )
(1.7 )
n- p- .
- ( ), ,
, (1.8 )
(1.8 )
n - p-, . n n 0 = D n 0 = D () ; g , ; tn t .
- tn t , .
- ,
(1.9 )
, (1.9 )
Ln Lp , .
, ,
, (1.10)
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j ; x ; r(x) ; es , e 0 .