Physics of Semiconductor Devices

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Minority carrier concentrations in a bipolar transistor

A npn bipolar transistor is biased in the saturation mode. The emitter is more heavily doped than the collector. Select the minority charge distribution that corresponds to this mode.

(1)      

(2)      

(3)      

(4)      

(5)      

(6)      

(7)      

(8)      

1       2       3       4       5       6       7       8      

On an exam, this question would not be multiple choice. You would be asked to draw the minority charge distribution.