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Mention the important considerations required while fabricating a p – n junction diode to be used as a Light Emitting Diode (LED).What should be the order of band gap of an LED if it is required to emit light in the visible range?

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LEDs have a very low reverse breakdown voltage, which is roughly 5V. When manufacturing a pn-junction diode, care must be taken to ensure that excessive reverse voltages do not arise across them.
The current in LEDs is limited by a very small resistance. As a result, a resistor must be connected in series with the LED to prevent the LED from being damaged.
The semiconductor used to make visible LEDs must have a band gap of at least 1.8 eV.
Final Solution:
The semiconductor used to make visible LEDs must have a band gap of at least 1.8 eV.

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