题目内容

The concentration of excess minority carrier concentration at the surface is less than that of excess minority carrier in the interior. ( )

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Excess hole concentration in the x=0 with the increase of time for zero applied electric field will decrease gradually. ( )

The ambipolar transport equation is a linear differential equation. ( )

As the distance from a semiconductor surface decreases, the steady-state excess hole concentration will ( ).

A. increase
B. decrease
C. remain unchanged
D. be close to zero

The excess minority carrier lifetime at the surface is ( ) the corresponding lifetime in the bulk material.

A. equal to
B. more than
C. small than
D. greater than