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  4. The barrier potential of a p-n junction depends on (1) type of semiconductor material (2) amount of doping (3) temperature Which one of the following is correct?

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Q. The barrier potential of a $p-n$ junction depends on
(1) type of semiconductor material
(2) amount of doping
(3) temperature
Which one of the following is correct?

AIPMTAIPMT 2014Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

The barrier potential depends on type of semiconductor (For Si, $V_{b}=0.7 \,V$ and for $Ge , V_{b}=0.3\, V$ ), amount of doping and also on the temperature.