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Name the p-n junction diode which emit s...

Name the p-n junction diode which emit spontaneous radiation when forward biased. How do we choose the semiconductor, to be used in those diodes, if the emitted radiation is to be in the visible region?

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Light emitting diode (LED)
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Name the p-n junction diode which emit spontaneous radiation when frrward biased. How do we choose the semiconductor, to be used in those diodes, if the emitted rediation is to be in the visible region?

When a p-n junction diode is reverse biased

When p-n junction diode is forward biased then

When p- n junction diode is forward baised them

Assertion : Light emitting diode (LED) emits spontaneous radiation. Reason : LED are forward biased p-n junctions.

With forward biased mode, the p-n junction diode

For making p-n junction diode forward biased: