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When a PN juction diode is forwards bias...

When a `PN` juction diode is forwards biased, energy is released at the juction due to the recombination of electrons and holes. This energy is in

A

Visible region

B

Infrared region

C

`UV` region

D

`X`-ray region

Text Solution

Verified by Experts

The correct Answer is:
B
Not that if `PN` junction diode is made from germenium or silicon, the energy released due to recombination of free electrons and holes is in the infrared retion. However if the `PN` junction diode is infrared diode is made from gallium arsenide or indium phosphide, then the energy released due to recombination of free electrons and holes is in the visible region.
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